diff --git a/test/declarations.d.ts b/test/declarations.d.ts
index a0a45094..63c06435 100644
--- a/test/declarations.d.ts
+++ b/test/declarations.d.ts
@@ -1,4 +1,13 @@
-declare module "test/nbrowser/gristUtil-nbrowser";
+declare module "test/nbrowser/gristUtil-nbrowser" {
+  // TODO - tsc can now do nice type inference for most of this, except $,
+  // so could change how export is done. Right now it leads to a mess because
+  // of $.
+  export declare let $: any;
+  export declare let gu: any;
+  export declare let server: any;
+  export declare let test: any;
+}
+
 
 // Adds missing type declaration to chai
 declare namespace Chai {
diff --git a/test/nbrowser/LinkingErrors.ts b/test/nbrowser/LinkingErrors.ts
new file mode 100644
index 00000000..5d5d4aa6
--- /dev/null
+++ b/test/nbrowser/LinkingErrors.ts
@@ -0,0 +1,182 @@
+/**
+ * Test various error situations with linking page widgets.
+ */
+import {assert, driver, stackWrapFunc} from 'mocha-webdriver';
+import * as gu from 'test/nbrowser/gristUtils';
+import {setupTestSuite} from 'test/nbrowser/testUtils';
+
+import {toTableDataAction} from 'app/common/DocActions';
+import {schema} from 'app/common/schema';
+import {TableData} from 'app/common/TableData';
+import {DocAPI, UserAPI} from 'app/common/UserAPI';
+
+describe("LinkingErrors", function() {
+  this.timeout(20000);
+  const cleanup = setupTestSuite();
+  let session: gu.Session;
+  let api: UserAPI;
+  let docId: string;
+
+  afterEach(() => gu.checkForErrors());
+
+  it("should link correctly in the normal case", async function() {
+    session = await gu.session().teamSite.login();
+    api = session.createHomeApi();
+    docId = await session.tempNewDoc(cleanup, 'LinkingErrors1', {load: false});
+
+    // Make a table with some data.
+    await api.applyUserActions(docId, [
+      ['AddTable', 'Planets', [{id: 'PlanetName'}]],
+      // Negative IDs allow referrnig to added records in the same action bundle.
+      ['AddRecord', 'Planets', -1, {PlanetName: 'Earth'}],
+      ['AddRecord', 'Planets', -2, {PlanetName: 'Mars'}],
+      ['AddTable', 'Moons', [{id: 'MoonName'}, {id: 'Planet', type: 'Ref:Planets'}]],
+      ['AddRecord', 'Moons', null, {MoonName: 'Phobos', Planet: -2}],
+      ['AddRecord', 'Moons', null, {MoonName: 'Deimos', Planet: -2}],
+      ['AddRecord', 'Moons', null, {MoonName: 'Moon', Planet: -1}],
+    ]);
+
+    // Load the document.
+    await session.loadDoc(`/doc/${docId}`);
+
+    await gu.getPageItem('Planets').click();
+    await gu.waitForDocToLoad();
+    await gu.addNewSection(/Table/, /Moons/, {selectBy: /PLANETS/});
+
+    await checkLinking();
+  });
+
+  // Check that normal linking works.
+  const checkLinking = stackWrapFunc(async function() {
+    await gu.getCell({section: 'PLANETS', rowNum: 1, col: 'PlanetName'}).click();
+    assert.deepEqual(await gu.getVisibleGridCells({section: 'MOONS', col: 'MoonName', rowNums: [1, 2]}),
+      ['Moon', '']);
+    await gu.getCell({section: 'PLANETS', rowNum: 2, col: 'PlanetName'}).click();
+    assert.deepEqual(await gu.getVisibleGridCells({section: 'MOONS', col: 'MoonName', rowNums: [1, 2, 3]}),
+      ['Phobos', 'Deimos', '']);
+  });
+
+  it("should unset linking setting when changing the data table for a widget", async function() {
+    await gu.getCell({section: 'Moons', rowNum: 1, col: 'MoonName'}).click();
+    await gu.toggleSidePanel('right', 'open');
+    await driver.find('.test-right-tab-pagewidget').click();
+    await driver.findContent('.test-right-panel button', /Change Widget/).click();
+
+    assert.equal(await driver.find('.test-wselect-table-label[class*=-selected]').getText(), 'Moons');
+    await driver.findContent('.test-wselect-table', /Planets/).click();
+    assert.match(await driver.find('.test-wselect-selectby').value(), /Select Widget/);
+
+    await driver.find('.test-wselect-addBtn').doClick();
+    await gu.waitForServer();
+
+    // Check that the two sections on the page are now for the same table, and link settings are
+    // cleared.
+    const tables = await getTableData(api.getDocAPI(docId), '_grist_Tables');
+    const sections = await getTableData(api.getDocAPI(docId), '_grist_Views_section');
+    const planetsTable = tables.filterRecords({tableId: 'Planets'})[0];
+    assert.isOk(planetsTable);
+    const planetsSections = sections.filterRecords({tableRef: planetsTable.id});
+    assert.lengthOf(planetsSections, 3);
+    assert.equal(planetsSections[0].parentId, planetsSections[2].parentId);
+    assert.deepEqual(planetsSections.map(s => s.linkTargetColRef), [0, 0, 0]);
+    assert.deepEqual(planetsSections.map(s => s.linkSrcSectionRef), [0, 0, 0]);
+    assert.deepEqual(planetsSections.map(s => s.linkSrcColRef), [0, 0, 0]);
+
+    // Switch to another page and back and check that there are no errors.
+    await gu.getPageItem('Moons').click();
+    await gu.checkForErrors();
+    await gu.getPageItem('Planets').click();
+    await gu.checkForErrors();
+
+    // Now undo.
+    await gu.undo();
+
+    // Still should have no errors, and linking should be restored.
+    await gu.checkForErrors();
+    await checkLinking();
+  });
+
+  it("should fail to link gracefully when linking settings are wrong", async function() {
+    // Fetch link settings, then mess them up.
+    const columns = await getTableData(api.getDocAPI(docId), '_grist_Tables_column');
+    const sections = await getTableData(api.getDocAPI(docId), '_grist_Views_section');
+    const planetRefCol = columns.filterRecords({colId: 'Planet'})[0];       // In table Moons
+    const planetNameCol = columns.filterRecords({colId: 'PlanetName'})[0];  // In table Planets
+    assert.isOk(planetRefCol);
+    assert.isOk(planetNameCol);
+    const planetSec = sections.filterRecords({linkTargetColRef: planetRefCol.id})[0];
+    assert.isOk(planetSec);
+
+    // Set invalid linking. The column we are setting is for the wrong table. It used to happen
+    // occasionally due to other bugs, here we check that we ignore such invalid settings.
+    await api.applyUserActions(docId, [
+      ['UpdateRecord', '_grist_Views_section', planetSec.id, {linkTargetColRef: planetNameCol.id}]
+    ]);
+
+    // Reload the page.
+    await driver.navigate().refresh();
+    await gu.waitForDocToLoad();
+
+    // Expect no errors, and expect to see data, although it's no longer linked.
+    await gu.checkForErrors();
+    await gu.getCell({section: 'PLANETS', rowNum: 1, col: 'PlanetName'}).click();
+    assert.deepEqual(await gu.getVisibleGridCells({section: 'MOONS', col: 'MoonName', rowNums: [1, 2, 3, 4]}),
+      ['Phobos', 'Deimos', 'Moon', '']);
+
+    // Reverting to correct settings should make the data linked again.
+    await api.applyUserActions(docId, [
+      ['UpdateRecord', '_grist_Views_section', planetSec?.id, {linkTargetColRef: planetRefCol.id}]
+    ]);
+    await gu.checkForErrors();
+    await checkLinking();
+  });
+
+  it("should recreate page with undo", async function() {
+    const tempDoc = await session.tempNewDoc(cleanup, 'LinkingErrors2', {load: false});
+    // This tests the bug: When removing page with linked sections and then undoing, there are two JS errors raised:
+    // - flexSize is not a function
+    // - getter is not a function
+
+    // To recreate create a simple document:
+    // - Table1 with default columns
+    // - Table2 with A being reference to Table1
+    // - For Table1 page add:
+    // -- Single card view selected by Table1
+    // -- Table2 view selected by Table1
+    // And make some updates that will cause a bug (without it undoing works).
+    // Modify the layout for page Table1, this makes the first JS bug (flexSize ...) when undoing.
+    // And add some records, which makes the second JS bug (getter is not a function).
+    const actions = [
+      ['CreateViewSection', 1, 1, 'single', null, null],
+      ['AddEmptyTable', null],
+      ['UpdateRecord', '_grist_Tables_column', 6, {type: 'Ref:Table1'}],
+      ['CreateViewSection', 2, 1, 'record', null, null],
+      ['UpdateRecord', '_grist_Views_section', 3, {linkSrcSectionRef: 1, linkSrcColRef: 0, linkTargetColRef: 0}],
+      ['UpdateRecord', '_grist_Views_section', 6, {linkSrcSectionRef: 1, linkSrcColRef: 0, linkTargetColRef: 6}],
+      [
+        'UpdateRecord',
+        '_grist_Views',
+        1,
+        {layoutSpec: '{"children":[{"children":[{"leaf":1},{"children":[{"leaf":2},{"leaf":4}]}]}]}'},
+      ],
+      ['AddRecord', 'Table1', null, {A: '1'}],
+      ['AddRecord', 'Table2', null, {A: 1, B: '2'}],
+    ];
+    await api.applyUserActions(tempDoc, actions);
+    // Load the document.
+    await session.loadDoc(`/doc/${tempDoc}`);
+    const revert = await gu.begin();
+    // Remove the first page (and Table1).
+    await gu.removePage('Table1', {withData: true});
+    await gu.waitForServer();
+    // And do undo
+    await revert();
+    await gu.checkForErrors();
+  });
+});
+
+async function getTableData(docApi: DocAPI, tableId: string): Promise<TableData> {
+  const colValues = await docApi.getRows(tableId);
+  const tableAction = toTableDataAction(tableId, colValues);
+  return new TableData(tableId, tableAction, (schema as any)[tableId]);
+}
diff --git a/test/nbrowser/RawData.ts b/test/nbrowser/RawData.ts
new file mode 100644
index 00000000..c1749f6c
--- /dev/null
+++ b/test/nbrowser/RawData.ts
@@ -0,0 +1,701 @@
+import {UserAPI} from 'app/common/UserAPI';
+import {assert, driver, Key} from 'mocha-webdriver';
+import * as gu from 'test/nbrowser/gristUtils';
+import {server, setupTestSuite} from 'test/nbrowser/testUtils';
+
+describe('RawData', function () {
+  this.timeout(30000);
+  let api: UserAPI;
+  let doc: string;
+  // We will stress undo here and will try to undo all tests that were using RAW DATA views.
+  // At the time of writing this test, undo was basically not possible and was throwing all sort
+  // of exceptions (related to summary tables).
+  let revertAll: () => Promise<void>;
+  setupTestSuite();
+  gu.bigScreen();
+  afterEach(() => gu.checkForErrors());
+  before(async function () {
+    await server.simulateLogin('Chimpy', 'chimpy@getgrist.com', 'nasa');
+    const docInfo = await gu.importFixturesDoc('chimpy', 'nasa', 'Horizon', 'World.grist');
+    doc = docInfo.id;
+    api = gu.createHomeApi('Chimpy', 'nasa');
+    await openRawData();
+    revertAll = await gu.begin();
+  });
+
+  it('shows all tables', async function () {
+    const uiTables = await getRawTableIds();
+    const data = await api.getTable(doc, '_grist_Tables');
+    const tables: string[] = data.tableId as string[];
+    tables.sort();
+    uiTables.sort();
+    assert.deepEqual(uiTables, tables);
+  });
+
+  it('shows row counts of all tables', async function () {
+    assert.deepEqual(await getRawTableRows(), [
+      '4,079',
+      '239',
+      '984',
+      '4',
+    ]);
+  });
+
+  it('shows new table name', async function () {
+    await gu.renameTable('City', 'Town');
+    const uiTables = await getRawTableIds();
+    const data = await api.getTable(doc, '_grist_Tables');
+    const tables: string[] = data.tableId as string[];
+    tables.sort();
+    uiTables.sort();
+    assert.deepEqual(uiTables, tables);
+  });
+
+  it('shows table preview', async function () {
+    // Open modal with grid
+    await driver.findContent('.test-raw-data-table-title', 'Country').click();
+    await gu.waitForServer();
+    // Test that overlay is showed.
+    assert.isTrue(await driver.findWait('.test-raw-data-overlay', 100).isDisplayed());
+    // Test proper table is selected.
+    assert.equal(await gu.getSectionTitle(), 'Country');
+    // Test we have some data.
+    assert.deepEqual(await gu.getVisibleGridCells('Code', [1, 2], 'Country'), ['ABW', 'AFG']);
+    // Test we can close by button.
+    await gu.closeRawTable();
+    assert.isFalse(await driver.find('.test-raw-data-overlay').isPresent());
+
+    // Test we can close by pressing escape.
+    await driver.findContent('.test-raw-data-table-title', 'Country').click();
+    assert.isTrue(await driver.find('.test-raw-data-overlay').isDisplayed());
+    await driver.sendKeys(Key.ESCAPE);
+    assert.isFalse(await driver.find('.test-raw-data-overlay').isPresent());
+
+    // Test we can't close by pressing escape when there is a selection,
+    await driver.findContent('.test-raw-data-table-title', 'Country').click();
+    assert.isTrue(await driver.find('.test-raw-data-overlay').isDisplayed());
+    await driver.find('.gridview_data_corner_overlay').doClick();
+    await driver.sendKeys(Key.ESCAPE);
+    assert.isTrue(await driver.find('.test-raw-data-overlay').isDisplayed());
+    // Press ESCAPE one more time to close.
+    await driver.sendKeys(Key.ESCAPE);
+    assert.isFalse(await driver.find('.test-raw-data-overlay').isPresent());
+
+    // Test we can close by clicking on overlay.
+    await driver.findContent('.test-raw-data-table-title', 'Country').click();
+    assert.isTrue(await driver.find('.test-raw-data-overlay').isDisplayed());
+    await driver.find('.test-raw-data-close-button').mouseMove();
+    await driver.mouseMoveBy({y: 100}); // move 100px below (not negative value)
+    await driver.withActions(a => a.click());
+    assert.isFalse(await driver.find('.test-raw-data-overlay').isPresent());
+  });
+
+  it('should rename table from modal window', async function () {
+    // Open Country table.
+    await driver.findContent('.test-raw-data-table-title', 'Country').click();
+    await gu.waitForServer();
+    // Rename section to Empire
+    await gu.renameActiveTable('Empire');
+    // Close and test that it was renamed
+    await gu.closeRawTable();
+    const tables = await getRawTableIds();
+    const titles = await driver.findAll('.test-raw-data-table-title', e => e.getText());
+    tables.sort();
+    titles.sort();
+    // Title should also be renamed for now. In follow-up diff those
+    // two will be separate.
+    assert.deepEqual(titles, ['Town', 'Empire', 'CountryLanguage', 'Table1'].sort());
+    assert.deepEqual(tables, ['Town', 'Empire', 'CountryLanguage', 'Table1'].sort());
+  });
+
+  it('should remove table', async function () {
+    // Open menu for Town
+    await openMenu('Town');
+    // Click delete.
+    await clickRemove();
+    // Confirm.
+    await clickConfirm();
+    await gu.waitForServer();
+    const tables = await getRawTableIds();
+    const titles = await driver.findAll('.test-raw-data-table-title', e => e.getText());
+    tables.sort();
+    titles.sort();
+    // Title should also be renamed for now. In a follow-up diff those
+    // two will be separate.
+    assert.deepEqual(titles, ['Empire', 'CountryLanguage', 'Table1'].sort());
+    assert.deepEqual(tables, ['Empire', 'CountryLanguage', 'Table1'].sort());
+  });
+
+  it('should duplicate table', async function () {
+    await openMenu('Empire');
+    await clickDuplicateTable();
+    await driver.find('.test-duplicate-table-name').click();
+    await gu.sendKeys('Empire Copy');
+
+    // Before clicking the Copy All Data checkbox, check that no warning about ACLs is shown.
+    assert.isFalse(await driver.find('.test-duplicate-table-acl-warning').isPresent());
+
+    // Now click the Copy All Data checkbox, and check that the warning is shown.
+    await driver.find('.test-duplicate-table-copy-all-data').click();
+    assert.isTrue(await driver.find('.test-duplicate-table-acl-warning').isPresent());
+
+    await clickConfirm();
+    await gu.waitForServer();
+    assert.isTrue(await driver.findWait('.test-raw-data-overlay', 100).isDisplayed());
+    assert.equal(await gu.getSectionTitle(), 'Empire Copy');
+    assert.deepEqual(await gu.getVisibleGridCells('Code', [1, 2], 'Empire Copy'), ['ABW', 'AFG']);
+
+    await driver.sendKeys(Key.ESCAPE);
+    const tables = await getRawTableIds();
+    const titles = await driver.findAll('.test-raw-data-table-title', e => e.getText());
+    tables.sort();
+    titles.sort();
+    assert.deepEqual(titles, ['Empire', 'Empire Copy', 'CountryLanguage', 'Table1'].sort());
+    assert.deepEqual(tables, ['Empire', 'Empire_Copy', 'CountryLanguage', 'Table1'].sort());
+  });
+
+  it('should restore position when browser is refreshed', async function () {
+    await driver.findContent('.test-raw-data-table-title', 'Empire').click();
+    await gu.waitForServer();
+    await gu.getCell(3, 2).click();
+    await driver.navigate().refresh();
+    await gu.waitForDocToLoad();
+    assert.isTrue(await driver.findWait('.test-raw-data-overlay', 100).isDisplayed());
+    assert.deepEqual(await gu.getCursorPosition(), {col: 3, rowNum: 2});
+    // Close overlay.
+    await driver.sendKeys(Key.ESCAPE);
+  });
+
+  it('should restore last edit position when browser is refreshed', async function () {
+    await driver.findContent('.test-raw-data-table-title', 'Empire').click();
+    await gu.waitForServer();
+    await gu.getCell(2, 9).click();
+    await driver.sendKeys('123456789');
+    await gu.refreshDismiss();
+    await gu.waitForDocToLoad();
+    assert.isTrue(await driver.findWait('.test-raw-data-overlay', 100).isDisplayed());
+    await gu.checkTextEditor(gu.exactMatch('123456789'));
+    // Close editor.
+    await driver.sendKeys(Key.ESCAPE);
+    assert.deepEqual(await gu.getCursorPosition(), {col: 2, rowNum: 9});
+    // Close overlay.
+    await driver.sendKeys(Key.ESCAPE);
+  });
+
+  it('should copy anchor link and restore', async function () {
+    await driver.findContent('.test-raw-data-table-title', 'Empire').click();
+    await gu.waitForServer();
+    await (await gu.openRowMenu(10)).findContent('li', /Copy anchor link/).click();
+    await driver.findContentWait('.test-notifier-toast-message', /Link copied to clipboard/, 2000);
+    await driver.find('.test-notifier-toast-close').click();
+    const anchor = (await gu.getTestState()).clipboard!;
+    await gu.getCell(3, 2).click();
+    await gu.onNewTab(async () => {
+      await driver.get(anchor);
+      await gu.waitForAnchor();
+      assert.isTrue(await driver.findWait('.test-raw-data-overlay', 100).isDisplayed());
+      assert.deepEqual(await gu.getCursorPosition(), {col: 0, rowNum: 10});
+    });
+    // Close overlay.
+    await driver.sendKeys(Key.ESCAPE);
+  });
+
+  it('should copy table name', async function () {
+    await driver.findContentWait('.test-raw-data-table-id', 'Empire', 1000).click();
+    await gu.waitToPass(async () => {
+      assert.equal((await gu.getTestState()).clipboard, 'Empire');
+    }, 500);
+    // Currently tooltip is not dismissible, so let's refresh the page.
+    await driver.navigate().refresh();
+    await waitForRawData();
+  });
+
+  it('shows summary tables under Raw Data Tables', async function () {
+    // Add a few summary tables: 1 with no group-by columns, and 2 that
+    // share the same group-by columns.
+    for (let i = 0; i <= 2; i++) {
+      await gu.addNewPage(/Table/, /CountryLanguage/, {
+        summarize: i === 0 ? [] : ['Country']
+      });
+    }
+
+    // Check that the added summary tables are listed at the end.
+    await openRawData();
+    assert.deepEqual(await getRawTableTitles(), [
+      'CountryLanguage',
+      'Empire',
+      'Empire Copy',
+      'Table1',
+      'CountryLanguage [Totals]',
+      'CountryLanguage [by Country]',
+    ]);
+    assert.deepEqual(await getRawTableIds(), [
+      'CountryLanguage',
+      'Empire',
+      'Empire_Copy',
+      'Table1',
+      'CountryLanguage_summary',
+      'CountryLanguage_summary_Country',
+    ]);
+  });
+
+  it('shows preview of summary table when clicked', async function () {
+    // Open a summary table.
+    await driver.findContent('.test-raw-data-table-title', 'CountryLanguage [by Country]').click();
+    await gu.waitForServer();
+
+    // Check that an overlay is shown.
+    assert.isTrue(await driver.findWait('.test-raw-data-overlay', 100).isDisplayed());
+
+    // Check that the right section title is shown.
+    assert.equal(await gu.getSectionTitle(), 'COUNTRYLANGUAGE [by Country]');
+
+    // Make sure the data looks correct.
+    assert.deepEqual(
+      await gu.getVisibleGridCells('Country', [1, 2, 3, 4, 5], 'CountryLanguage [by Country]'),
+      ['ABW', 'AFG', 'AGO', 'AIA', 'ALB'],
+    );
+
+    // Close the overlay.
+    await gu.closeRawTable();
+    assert.isFalse(await driver.find('.test-raw-data-overlay').isPresent());
+  });
+
+  it('removes summary table when all sections referencing it are removed', async function () {
+    // CountryLanguage [Totals] and CountryLanguage [by Country] respectively.
+    await gu.removePage('New page');
+    await gu.removePage('New page');
+
+    // Check that the table summarizing by country wasn't removed, since there is still
+    // one more view for it.
+    assert.deepEqual(await getRawTableTitles(), [
+      'CountryLanguage',
+      'Empire',
+      'Empire Copy',
+      'Table1',
+      'CountryLanguage [by Country]',
+    ]);
+  });
+
+  it('removes summary table when source table is removed', async function () {
+    await removeRawTable('CountryLanguage');
+    assert.deepEqual(await getRawTableTitles(), [
+      'Empire',
+      'Empire Copy',
+      'Table1',
+    ]);
+    await gu.undo();
+    assert.deepEqual(await getRawTableTitles(), [
+      'CountryLanguage',
+      'Empire',
+      'Empire Copy',
+      'Table1',
+      'CountryLanguage [by Country]',
+    ]);
+  });
+
+  it('removes summary table when "Remove" menu item is clicked', async function () {
+    const tableIds = await getRawTableIds();
+    await removeRawTable(tableIds[tableIds.length - 1]);
+
+    const titles = await getRawTableTitles();
+    assert.deepEqual(titles, [
+      'CountryLanguage',
+      'Empire',
+      'Empire Copy',
+      'Table1',
+    ]);
+  });
+
+  it('should stay on a page when undoing summary table', async function () {
+    // Undoing after converting a table to a summary table doesn't know
+    // where to navigate, as section is removed and recreated during navigation
+    // and it is not connected to any view for a brief moment - which makes that
+    // section look like a Raw Data View (section without a view).
+
+    // This tests that the section is properly identified and Grist will not navigate
+    // to the Raw Data view.
+    await gu.addNewTable();
+    const url = await driver.getCurrentUrl();
+    assert.isTrue(url.endsWith('p/8'));
+    await convertToSummary();
+    assert.equal(url, await driver.getCurrentUrl());
+    await gu.undo();
+    assert.equal(url, await driver.getCurrentUrl());
+    await gu.redo();
+    // Reverting actually went to a bare document url (without a page id)
+    // This was old buggy behavior that is now fixed.
+
+    assert.equal(url, await driver.getCurrentUrl());
+    assert.deepEqual(await gu.getCursorPosition(), {rowNum: 1, col: 0});
+
+    // Switching pages was producing error after undoing summary table.
+    await gu.openPage('Empire');
+    await gu.checkForErrors();
+    await gu.openPage('Table2');
+    await gu.checkForErrors();
+  });
+
+  it('should remove all tables except one (including referenced summary table)', async function () {
+    // First we will add a new summary table for CountryLanguage table.
+    // This table has a reference to the Country table, and Grist had a bug that
+    // didn't allow to delete those tables - so here we will test if this is fixed.
+    await gu.addNewPage('Table', 'CountryLanguage', {
+      summarize: ['Country'],
+    });
+
+    await openRawData();
+
+    const allTables = await getRawTableIds();
+
+    // Now we are ready to test deletion.
+    const beforeDeleteCheckpoint = await gu.begin();
+
+    // First remove that table without a raw section, to see if that works.
+    await removeRawTable('Table1');
+    await gu.checkForErrors();
+    assert.isFalse((await getRawTableIds()).includes('Table1'));
+
+    // Now try to remove Country (now Empire) table - here we had a bug
+    await removeRawTable('Empire');
+    await gu.checkForErrors();
+    assert.isFalse((await getRawTableIds()).includes('Empire'));
+
+    // Now revert and remove all until remove is disabled
+    await beforeDeleteCheckpoint();
+    await openRawData();
+
+    while (allTables.length > 1) {
+      await removeRawTable(allTables.pop()!);
+    }
+
+    // We should have only one table
+    assert.deepEqual(await getRawTableIds(), allTables);
+
+    // The last table should have disabled remove button.
+    await openMenu(allTables[0]);
+    assert.isTrue(await driver.find('.test-raw-data-menu-remove.disabled').isDisplayed());
+    await gu.sendKeys(Key.ESCAPE);
+  });
+
+  it('should allow removing GristHidden* pages', async () => {
+    // Add a table named GristHidden_test, to test when such tables are left over after an incomplete import.
+
+    // Prepare two tables to test
+    await gu.addNewTable();
+    // Remove last old table we have
+    await openRawData();
+    await removeRawTable('CountryLanguage');
+
+    await gu.addNewTable();
+    assert.deepEqual(await gu.getPageNames(), ['Table1', 'Table2']);
+
+    // Rename Table2 page to GristHidden_test, it should be still visible, as the table
+    // id is diffrent (not hidden).
+    await gu.renamePage('Table1', 'GristHidden_test');
+    assert.deepEqual(await gu.getPageNames(), ['GristHidden_test', 'Table2']);
+    // Make sure all pages can be removed
+    for (const page of await gu.getPageNames()) {
+      assert.isTrue(await gu.canRemovePage(page));
+    }
+    await gu.removePage('Table2');
+    assert.deepEqual(await gu.getPageNames(), ['GristHidden_test']);
+    assert.isFalse(await gu.canRemovePage('GristHidden_test'));
+    await gu.undo();
+
+    await gu.removePage('GristHidden_test');
+    assert.deepEqual(await gu.getPageNames(), ['Table2']);
+    assert.isFalse(await gu.canRemovePage('Table2'));
+    await gu.undo();
+    assert.deepEqual(await gu.getPageNames(), ['GristHidden_test', 'Table2']);
+  });
+
+  it('should allow removing hidden tables', async () => {
+    // Rename Table1 table to a simulate hidden table
+    await openRawData();
+    await gu.renameRawTable("Table2", "GristHidden_import");
+    assert.deepEqual(await getRawTableIds(), ['GristHidden_import', 'Table1']);
+    // Page should be hidden now
+    assert.deepEqual(await gu.getPageNames(), ['GristHidden_test']);
+    assert.isFalse(await gu.canRemovePage('GristHidden_test'));
+    // We should be able to remove hidden table, but not user table (as this can be last table that will
+    // be auto-removed).
+    assert.isTrue(await isRemovable('GristHidden_import'));
+    assert.isFalse(await isRemovable('Table1'));
+
+    // Rename back
+    await gu.renameRawTable("GristHidden_import", "Table2");
+    // Page should be visible again
+    assert.deepEqual(await gu.getPageNames(), ['GristHidden_test', 'Table2']);
+    for (const page of await gu.getPageNames()) {
+      assert.isTrue(await gu.canRemovePage(page));
+    }
+    assert.isTrue(await isRemovable('Table2'));
+    assert.isTrue(await isRemovable('Table1'));
+
+    // Rename once again and test if it can be actually removed.
+    await gu.renameRawTable("Table2", "GristHidden_import");
+    assert.isTrue(await isRemovable('GristHidden_import'));
+    await removeRawTable("GristHidden_import");
+    await gu.checkForErrors();
+    assert.deepEqual(await getRawTableIds(), ['Table1']);
+    assert.isFalse(await isRemovable('Table1'));
+  });
+
+  it('should revert all without errors', async function () {
+    // Revert internally checks errors.
+    await revertAll();
+  });
+
+  it('should open raw data as a popup', async () => {
+    // We are at City table, in first row/first cell.
+    // Send some keys, to make sure we have focus on active section.
+    // RawData popup is manipulating what section has focus, so we need to make sure that
+    // focus is properly restored.
+    assert.deepEqual(await gu.getCursorPosition(), {rowNum: 1, col: 0});
+    await gu.getCell(0, 2).click();
+    await gu.sendKeys("abc");
+    await gu.checkTextEditor("abc");
+    await gu.sendKeys(Key.ESCAPE);
+    await showRawData();
+    assert.equal(await gu.getActiveSectionTitle(), 'City');
+    assert.deepEqual(await gu.getCursorPosition(), {rowNum: 20, col: 0}); // raw popup is not sorted
+    await gu.sendKeys("abc");
+    await gu.checkTextEditor("abc");
+    await gu.sendKeys(Key.ESCAPE);
+    // Click on another cell, check page hasn't changed (there was a bug about that)
+    await gu.getCell({rowNum: 10, col: 1}).click();
+    assert.deepEqual(await gu.getCursorPosition(), {rowNum: 10, col: 1});
+    assert.equal(await gu.getCurrentPageName(), 'City');
+
+    // Close by hitting escape.
+    await gu.sendKeys(Key.ESCAPE);
+    await assertNoPopup();
+    // Make sure we see CITY, and everything is where it should be.
+    assert.equal(await gu.getActiveSectionTitle(), 'CITY');
+    assert.deepEqual(await gu.getCursorPosition(), {rowNum: 2, col: 0});
+    await gu.sendKeys("abc");
+    await gu.checkTextEditor("abc");
+    await gu.sendKeys(Key.ESCAPE);
+
+    // Now open popup again, but close it by clicking on the close button.
+    await showRawData();
+    await gu.closeRawTable();
+    await assertNoPopup();
+    assert.equal(await gu.getActiveSectionTitle(), 'CITY');
+    assert.deepEqual(await gu.getCursorPosition(), {rowNum: 2, col: 0});
+    await gu.sendKeys("abc");
+    await gu.checkTextEditor("abc");
+    await gu.sendKeys(Key.ESCAPE);
+
+    // Now do the same, but close by clicking on a diffrent page
+    await showRawData();
+    await gu.getPageItem('Country').click();
+    await assertNoPopup();
+    assert.equal(await gu.getActiveSectionTitle(), 'COUNTRY');
+    assert.deepEqual(await gu.getCursorPosition(), {rowNum: 1, col: 0});
+    await gu.sendKeys("abc");
+    await gu.checkTextEditor("abc");
+    await gu.sendKeys(Key.ESCAPE);
+
+    // Now make sure that raw data is available for card view.
+    await gu.selectSectionByTitle("COUNTRY Card List");
+    assert.equal(await gu.getActiveSectionTitle(), 'COUNTRY Card List');
+    await showRawData();
+    assert.equal(await gu.getActiveSectionTitle(), 'Country');
+    assert.deepEqual(await gu.getCursorPosition(), {rowNum: 1, col: 1});
+    await gu.sendKeys("abc");
+    await gu.checkTextEditor("abc");
+    await gu.sendKeys(Key.ESCAPE);
+    // Make sure we see a grid
+    assert.isTrue(await driver.find(".grid_view_data").isDisplayed());
+    await gu.sendKeys(Key.ESCAPE);
+  });
+
+  // This is not documented feature at this moment, and tailored for raw data
+  // view, but it should work for any kind of section.
+  it('should open detail section as a popup', async () => {
+    // We are at the Country page
+    await gu.getDetailCell('Code', 1).click();
+    let anchorLink = replaceAnchor(await gu.getAnchor(), { a: '2' });
+    const testResult = async () => {
+      await waitForAnchorPopup(anchorLink);
+      assert.equal(await gu.getActiveSectionTitle(), 'COUNTRY Card List');
+      assert.deepEqual(await gu.getCursorPosition(), {rowNum: 1, col: 'Code'});
+      await gu.sendKeys("abc");
+      await gu.checkTextEditor("abc");
+      await gu.sendKeys(Key.ESCAPE);
+      // Close by hitting escape.
+      await gu.sendKeys(Key.ESCAPE);
+      // Make sure we are on correct page
+      assert.equal(await gu.getCurrentPageName(), "City");
+    };
+    // Switch page and use only hash, otherwise it will just maximize the section on the current page.
+    await gu.getPageItem('City').click();
+    anchorLink = (await driver.getCurrentUrl()) + '#' + anchorLink.split('#')[1];
+    await testResult();
+  });
+
+  it('should open chart section as a popup', gu.revertChanges(async () => {
+    // We are at the Country page
+    await gu.getPageItem('Country').click();
+    await gu.selectSectionByTitle("COUNTRY Card List");
+    await gu.getDetailCell('Code', 1).click();
+    await gu.addNewSection(/Chart/, /CountryLanguage/);
+    // s19 is the new section id, we also strip row/column.
+    let chartLink = replaceAnchor(await gu.getAnchor(), {s: '19', a: '2'});
+    await gu.getPageItem('City').click();
+    chartLink = (await driver.getCurrentUrl()) + '#' + chartLink.split('#')[1];
+    await waitForAnchorPopup(chartLink);
+    assert.isTrue(await driver.find(".test-raw-data-overlay .test-chart-container").isDisplayed());
+    await gu.sendKeys(Key.ESCAPE);
+  }));
+
+  it('should handle edge cases when table/section is removed', async () => {
+    await gu.getPageItem('Country').click();
+    await gu.selectSectionByTitle("COUNTRY Card List");
+    await gu.getDetailCell('Code', 1).click();
+    let anchorLink = replaceAnchor(await gu.getAnchor(), { a: '2' });
+    await gu.getPageItem('City').click();
+    anchorLink = (await driver.getCurrentUrl()) + '#' + anchorLink.split('#')[1];
+    await waitForAnchorPopup(anchorLink);
+
+    assert.equal(await gu.getActiveSectionTitle(), 'COUNTRY Card List');
+    // Now remove the section using api, popup should be closed.
+    const sectionId = parseInt(getAnchorParams(anchorLink).s);
+    await api.applyUserActions(doc, [[
+      'RemoveRecord', '_grist_Views_section', sectionId
+    ]]);
+    await gu.waitForServer();
+    await gu.checkForErrors();
+    await assertNoPopup();
+    // Now open plain raw data for City table.
+    await gu.selectSectionByTitle("CITY");
+    assert.equal(await gu.getActiveSectionTitle(), 'CITY'); // CITY is viewSection title
+    await showRawData();
+    assert.equal(await gu.getActiveSectionTitle(), 'City'); // City is now a table title
+    // Now remove the table.
+    await api.applyUserActions(doc, [[
+      'RemoveTable', 'City'
+    ]]);
+    await gu.waitForServer();
+    await gu.checkForErrors();
+    await assertNoPopup();
+  });
+});
+
+const anchorRegex = /#a(\d+)\.s(\d+)\.r(\d+)\.c(\d+)/gm;
+
+function getAnchorParams(link: string) {
+  const match = anchorRegex.exec(link);
+  if (!match) { throw new Error("Invalid link"); }
+  const [, a, s, r, c] = match;
+  return { a, s, r, c };
+}
+
+function replaceAnchor(link: string, values: {
+  a?: string,
+  s?: string,
+  r?: string,
+  c?: string,
+}) {
+  const { a, s, r, c } = getAnchorParams(link);
+  return link.replace(anchorRegex, `#a${values.a || a}.s${values.s || s}.r${values.r || r}.c${values.c || c}`);
+}
+
+async function showRawData() {
+  await gu.openSectionMenu('viewLayout');
+  await driver.find('.test-show-raw-data').click();
+  await waitForPopup();
+}
+
+async function openRawData() {
+  await driver.find('.test-tools-raw').click();
+  await waitForRawData();
+}
+
+async function clickConfirm() {
+  await driver.find('.test-modal-confirm').click();
+}
+
+async function clickDuplicateTable() {
+  await driver.find('.test-raw-data-menu-duplicate-table').click();
+}
+
+async function clickRemove() {
+  await driver.find('.test-raw-data-menu-remove').click();
+}
+
+async function removeRawTable(tableId: string) {
+  await openMenu(tableId);
+  await clickRemove();
+  await clickConfirm();
+  await gu.waitForServer();
+}
+
+async function convertToSummary(...groupByColumns: string[]) {
+  // Convert table to a summary table
+  await gu.toggleSidePanel('right', 'open');
+  // Creator Panel > Table
+  await driver.find('.test-right-tab-pagewidget').click();
+  // Tab [Data]
+  await driver.find('.test-config-data').click();
+  // Edit Data Selection
+  await driver.find('.test-pwc-editDataSelection').click();
+  // Σ
+  await driver.find('.test-wselect-pivot').click();
+  // Select Group-By Columns
+  for (const c of groupByColumns) {
+    await driver.findContent('.test-wselect-column', c).click();
+  }
+  // Save
+  await driver.find('.test-wselect-addBtn').click();
+  await gu.waitForServer();
+}
+
+async function getRawTableTitles() {
+  return await driver.findAll('.test-raw-data-table-title', e => e.getText());
+}
+
+async function getRawTableIds() {
+  return await driver.findAll('.test-raw-data-table-id', e => e.getText());
+}
+
+async function getRawTableRows() {
+  return await driver.findAll('.test-raw-data-table-rows', e => e.getText());
+}
+
+async function openMenu(tableId: string) {
+  const allTables = await getRawTableIds();
+  const tableIndex = allTables.indexOf(tableId);
+  assert.isTrue(tableIndex >= 0, `No raw table with id ${tableId}`);
+  const menus = await driver.findAll('.test-raw-data-table .test-raw-data-table-menu');
+  assert.equal(menus.length, allTables.length);
+  await menus[tableIndex].click();
+}
+
+async function waitForRawData() {
+  await driver.findWait('.test-raw-data-list', 1000);
+  await gu.waitForServer();
+}
+
+async function isRemovable(tableId: string){
+  await openMenu(tableId);
+  const disabledItems = await driver.findAll('.test-raw-data-menu-remove.disabled');
+  await gu.sendKeys(Key.ESCAPE);
+  return disabledItems.length === 0;
+}
+
+async function waitForPopup() {
+  assert.isTrue(await driver.findWait('.test-raw-data-overlay', 100).isDisplayed());
+}
+
+async function assertNoPopup() {
+  assert.isFalse(await driver.find('.test-raw-data-overlay').isPresent());
+}
+
+async function waitForAnchorPopup(link: string) {
+  await driver.get(link);
+  await gu.waitForAnchor();
+  await waitForPopup();
+}