Summary:
As reported in https://grist.slack.com/archives/C069RUP71/p1655316194602829, when a table is hidden by ACL, it was still showing as a blank 'ghost' option to select data when adding a widget:
{F55498}
The fix is simply to return `true` from `isHiddenTable` for empty table IDs, which indicate a table hidden by ACL. `TableRec.isHidden` is supposed to match this so I updated it too, and I cleaned up a tiny bit of other related code.
Test Plan: Extended `nbrowser/AccessRules1.ts` to test the data options when adding widgets.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D3530
Summary: When traceback is present, give it 64px, or more if available, or less if less is needed. If less space is available than needed, the traceback will scroll within its allocated area.
Test Plan: The test FieldEditorSizing which tests basic sizing still passes; details with different size of formula and traceback were tested manually.
Reviewers: jarek
Reviewed By: jarek
Subscribers: jarek
Differential Revision: https://phab.getgrist.com/D3531
Summary:
With this, a custom widget can render an attachment by doing:
```
const tokenInfo = await grist.docApi.getAccessToken({readOnly: true});
const img = document.getElementById('the_image');
const id = record.C[0]; // get an id of an attachment
const src = `${tokenInfo.baseUrl}/attachments/${id}/download?auth=${tokenInfo.token}`;
img.setAttribute('src', src)
```
The access token expires after a few mins, so if a user right-clicks on an image
to save it, they may get access denied unless they refresh the page. A little awkward,
but s3 pre-authorized links behave similarly and it generally isn't a deal-breaker.
Test Plan: added tests
Reviewers: dsagal
Reviewed By: dsagal
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D3488
Summary:
Modifies CSS so that text overflow is handled by displaying an
ellipsis when raw table names exceed the width of their container.
Test Plan: Tested manually.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D3524
Summary:
A green line indicating the insertion point is now shown in the
ChoiceListEntry component when dragging and dropping choices, similar
to the one shown in the choice list cell editor.
Test Plan: Tested manually.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D3529
Summary:
When adding a summary table widget to a page and using 'select by' in the add widget config (as opposed to in the right panel for an existing widget):
1. If an equivalent summary table already exists, use its referencing columns (if any) to construct link nodes. Previously the source table columns were being used instead, which could include referencing columns that don't have any equivalent in the summary table, and exclude referencing columns in the summary table.
2. If no such summary table exists yet, then keep using the source table columns, but only the selected groupby columns, and
3. After the summary table is created, correct the `linkTargetColRef` (which points to a source table column) to the corresponding column from the new summary table instead.
This fixes bugs which only appeared recently since 'select by' for a summary table previously involved no target columns.
Test Plan: Added two new tests to `nbrowser/SelectBySummaryRef`, and confirmed that they fail without the fixes to all three points above.
Reviewers: dsagal
Reviewed By: dsagal
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D3527
Summary:
Use table titles (i.e. the raw data widget titles) in dropdowns and other parts of the Acess Rules page, instead of the table ID. This is particularly meant for summary tables which have/had an ID of the form `GristSummary_SourceTable_N`, but https://phab.getgrist.com/D3508 is changing that anyway.
The server method `getAclResources` now returns more metadata about each table so that the UI can display titles.
Test Plan: Extended and updated `nbrowser/AccessRules2.ts`. Added a small unit test for constructing table titles from the new description returned by `getAclResources`.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3494
Summary:
Most logging now includes altSessionId, but not the message logged at the end
of every request by the 'morgan' logger. This includes altSessionId in those
messages.
Test Plan: Verified that with GRIST_HOSTED_VERSION env var set, altSessionId is included in morgan-produced JSON messages.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Subscribers: georgegevoian
Differential Revision: https://phab.getgrist.com/D3523
Summary:
Improving billing page user experience.
- Updated labels for canceled plan
- Adding option to downgrade from team plan to free team plan
- Updating default name for teamFree plan when it is not available in Stripe
- Minor bug fixes
Test Plan: updated tests
Reviewers: cyprien
Reviewed By: cyprien
Subscribers: cyprien
Differential Revision: https://phab.getgrist.com/D3515
Summary:
A client error should no longer be thrown when filtering an empty Choice
or Choice List column.
Test Plan: Browser tests.
Reviewers: alexmojaki
Reviewed By: alexmojaki
Subscribers: alexmojaki
Differential Revision: https://phab.getgrist.com/D3528
Summary:
1. Log errors in `ActiveDoc.loadDoc` as errors, not just warnings, except for a common 'Cannot create fork' error caused by deployment tests.
2. Log the method name that had an error in `server/lib/Client.ts`.
Discussion: https://grist.slack.com/archives/CR8HZ4P9V/p1652364998893169
Following up on https://phab.getgrist.com/D3522
Test Plan: tested manually, particularly by running the nbrowser/Fork test that led to the initial noisy errors in Slack.
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D3525
Summary: The previous access check in `getFormulaError` was not strict enough, allowing users to read the values of individual formula cells that they shouldn't be able to. Now `getCellValue` is used to check the access for the specific cell first.
Test Plan: Extended GranularAccess server test.
Reviewers: paulfitz
Reviewed By: paulfitz
Subscribers: paulfitz
Differential Revision: https://phab.getgrist.com/D3526
Summary:
This adds rudimentary support for opening certain SQLite files in Grist.
If you have a file such as `landing.db` in Grist, you can convert it to Grist format by doing (either in monorepo or grist-core):
```
yarn run cli -h
yarn run cli sqlite -h
yarn run cli sqlite gristify landing.db
```
The file is now openable by Grist. To actually do so with the regular Grist server, you'll need to either import it, or convert some doc you don't care about in the `samples/` directory to be a soft link to it (and then force a reload).
This implementation is a rudimentary experiment. Here are some awkwardnesses:
* Only tables that happen to have a column called `id`, and where the column happens to be an integer, can be opened directly with Grist as it is today. That could be generalized, but it looked more than a Gristathon's worth of work, so I instead used SQLite views.
* Grist will handle tables that start with an uncapitalized letter a bit erratically. You can successfully add columns, for example, but removing them will cause sadness - Grist will rename the table in a confused way.
* I didn't attempt to deal with column names with spaces etc (though views could deal with those).
* I haven't tried to do any fancy type mapping.
* Columns with constraints can make adding new rows impossible in Grist, since Grist requires that a row can be added with just a single cell set.
Test Plan: added small test
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3502
Summary:
Changes auto-generated summary table IDs from e.g. `GristSummary_6_Table1` to `Table1_summary_A_B` (meaning `Table1` grouped by `A` and `B`). This makes it easier to write formulas involving summary tables, make API requests, understand logs, etc.
Because these don't encode the source table ID as reliably as before, `decode_summary_table_name` now uses the summary table schema info, not just the summary table ID. Specifically, it looks at the type of the `group` column, which is `RefList:<source table id>`.
Renaming a source table renames the summary table as before, and now renaming a groupby column renames the summary table as well.
Conflicting table names are resolved in the usual way by adding a number at the end, e.g. `Table1_summary_A_B2`. These summary tables are not automatically renamed when the disambiguation is no longer needed.
A new migration renames all summary tables to the new scheme, and updates formulas using summary tables with a simple regex.
Test Plan:
Updated many tests to use the new style of name.
Added new Python tests to for resolving conflicts when renaming source tables and groupby columns.
Added a test for the migration, including renames in formulas.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3508
Summary: Adds an InferenceTip which treats `Table.all` similarly to `Table.lookupRecords(...)`, so that `Table.all.foo` is changed to `Table.all.bar` when the column `foo` is renamed to `bar`.
Test Plan: Extended test for the `lookupRecords` case.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3521
Summary:
Cell selection would sometimes get out of sync, causing
unexpected results when pasting. The UI would also incorrectly
indicate that rows/columns were still selected if you clicked the
selected cell (outlined in green) after doing a drag selection of
multiple rows/columns. Finally, canceling a copy operation would
fail to remove the "scissors" outline around the copied cells if the
cursor was not on the copied selection.
This resolves all of these bugs.
Test Plan: Browser tests.
Reviewers: cyprien
Reviewed By: cyprien
Subscribers: cyprien
Differential Revision: https://phab.getgrist.com/D3517
Summary: Previously, changing the type of a column would clear its widget options and conditional style rules by default, with a few exceptions to explicitly keep them. This diff reverses that behaviour, keeping the options by default.
Test Plan: Updated several existing tests, plus lots of manual testing.
Reviewers: cyprien
Reviewed By: cyprien
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D3491
Summary:
Sometimes when rearranging items in choice editor, user can
put the new item inside last entry element, which is not recognized as
a choice entry.
Test Plan: manual tests
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3519
Summary: When the `getSummarySourceGroup` function (used by the `$group` column) finds that the group is empty, raise a new special exception `EmptySummaryRow`. The engine catches this exception, avoids saving a value to the cell, and removes the record.
Test Plan: Updated several Python tests
Reviewers: georgegevoian
Reviewed By: georgegevoian
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D3489
Summary:
- Adding a column through 'Add Reference Column' adds it to Raw Data
- Migrating RefSelect.js to typescript
- Extending one of the tests
Test Plan: updated
Reviewers: cyprien
Reviewed By: cyprien
Subscribers: cyprien
Differential Revision: https://phab.getgrist.com/D3513
Summary:
When a user requests to read the contents of an attachment, only allow the request if there exists a cell in an attachment column that contains the attachment and which they have read access to.
This does not cover:
* Granular write access for attachments. In particular, a user who can write to any attachment column should be considered to have full read access to all attachment columns, currently.
* Access control of attachment metadata such as name and format.
The implementation uses a sql query that requires a scan, and some notes on how this could be optimized in future. The web client was updated to specify the cell to check for access, and performance seemed fine in casual testing on a doc with 1000s of attachments. I'm not sure how performance would hold up as the set of access rules grows as well.
Test Plan: added tests
Reviewers: alexmojaki
Reviewed By: alexmojaki
Differential Revision: https://phab.getgrist.com/D3490
Summary:
The docker build touches very little of the test directory, but
just enough to have broken after a chai-as-promised related refactor.
This adds a file that is sufficient to get the build rolling again.
Test Plan:
confirmed this change is sufficient to build functional
docker images
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D3514
Summary:
Summary tables now have their own raw viewsection, and are shown
under Raw Data Tables on the Raw Data page.
Test Plan: Browser and Python tests.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D3495
Summary: When a formula raises an exception, we store that in the cell in memory. In Python 3, exceptions have a `__traceback__` attribute, which includes all the stack frames and local variables. This has huge memory leak potential. We already strategically format the exception when needed, we don't need to keep storing the actual traceback object.
Test Plan:
Manually tested that tracebacks are still sensible.
To check the effect on memory usage, made a simple test doc with 30k rows all containing an exception, and here's what ps aux says:
```
%MEM VSZ RSS
before: 2.4 681996 588828
after: 1.6 499052 405712
```
Reviewers: dsagal
Reviewed By: dsagal
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D3505
Summary:
- test/nbrowser/CustomFilter keeps randomly fail on my local dev
- it failed with `Cannot read property of null (reading 'postMessage`)` at line below:
`this._rpc.setSendMessage(msg => this._iframe?.contentWindow!.postMessage(msg, '*'));`
- I understand it was trying to send message before even the iframe was properly mounted
- telling rpc to wait for the other end to send ready() successfully differ send message until everything's mounted.
Test Plan: - should not break anything and test/nbrowser/CustomFilter should stop failing
Reviewers: jarek
Reviewed By: jarek
Subscribers: jarek
Differential Revision: https://phab.getgrist.com/D3510
Summary:
Building:
- Builds no longer wait for tsc for either client, server, or test targets. All use esbuild which is very fast.
- Build still runs tsc, but only to report errors. This may be turned off with `SKIP_TSC=1` env var.
- Grist-core continues to build using tsc.
- Esbuild requires ES6 module semantics. Typescript's esModuleInterop is turned
on, so that tsc accepts and enforces correct usage.
- Client-side code is watched and bundled by webpack as before (using esbuild-loader)
Code changes:
- Imports must now follow ES6 semantics: `import * as X from ...` produces a
module object; to import functions or class instances, use `import X from ...`.
- Everything is now built with isolatedModules flag. Some exports were updated for it.
Packages:
- Upgraded browserify dependency, and related packages (used for the distribution-building step).
- Building the distribution now uses esbuild's minification. babel-minify is no longer used.
Test Plan: Should have no behavior changes, existing tests should pass, and docker image should build too.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Subscribers: alexmojaki
Differential Revision: https://phab.getgrist.com/D3506
Summary:
- Get Jenkins to run on 4 agents in parallel, each executing 4 parallel test runs.
- Add a scheme for automatically selecting non-conflicting ports and Redis DB numbers.
- Add a scheme for automatically deciding how to group tests in large suites (nbrowser, server) to keep groups roughly equal.
- Add a recording of test timings, that's used for the auto-grouping.
- Fix tests that were sensitive to the order in which they were running.
Test Plan: All 5020 tests passed in 9 minutes (as opposed to the previous passing run which took 30).
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3500
Summary:
On Windows, last row is selected when a user clicks the 'new row'
while browser doesn't have focus.
Test Plan: manual tests
Reviewers: georgegevoian
Reviewed By: georgegevoian
Subscribers: georgegevoian
Differential Revision: https://phab.getgrist.com/D3503
Summary:
- Update nudge boxes content and collapsing on personal and free team site
- New confirmation after upgrading from a free team site
- Refactoring ProductUpgrade code, splitting plans / modals and nudges
Test Plan: Manual and updated tests
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3481
Summary:
- Upgrades to build-related packages:
- Upgrade typescript, related libraries and typings.
- Upgrade webpack, eslint; add tsc-watch, node-dev, eslint_d.
- Build organization changes:
- Build webpack from original typescript, transpiling only; with errors still
reported by a background tsc watching process.
- Typescript-related changes:
- Reduce imports of AWS dependencies (very noticeable speedup)
- Avoid auto-loading global @types
- Client code is now built with isolatedModules flag (for safe transpilation)
- Use allowJs to avoid copying JS files manually.
- Linting changes
- Enhance Arcanist ESLintLinter to run before/after commands, and set up to use eslint_d
- Update eslint config, and include .eslintignore to avoid linting generated files.
- Include a bunch of eslint-prompted and eslint-generated fixes
- Add no-unused-expression rule to eslint, and fix a few warnings about it
- Other items:
- Refactor cssInput to avoid circular dependency
- Remove a bit of unused code, libraries, dependencies
Test Plan: No behavior changes, all existing tests pass. There are 30 tests fewer reported because `test_gpath.py` was removed (it's been unused for years)
Reviewers: paulfitz
Reviewed By: paulfitz
Subscribers: paulfitz
Differential Revision: https://phab.getgrist.com/D3498
Summary:
This diff is first of a series of 3 commits to enable range filering
for Date and DateTime columns. Diff only enable setting date's min/max
throw typing dates, Date picker and relative ranges are left for
follow-up commits.
- Exposes columns value formatter to the range input
- Fixes column filter func to work with dates
Test Plan:
Adds Date to projects range filter test
Adds Date/DateTime to nbrowser ColumnFilterMenu tests
Reviewers: alexmojaki
Reviewed By: alexmojaki
Subscribers: alexmojaki
Differential Revision: https://phab.getgrist.com/D3455
Summary:
Adds a Python function `REQUEST` which makes an HTTP GET request. Behind the scenes it:
- Raises a special exception to stop trying to evaluate the current cell and just keep the existing value.
- Notes the request arguments which will be returned by `apply_user_actions`.
- Makes the actual request in NodeJS, which sends back the raw response data in a new action `RespondToRequests` which reevaluates the cell(s) that made the request.
- Wraps the response data in a class which mimics the `Response` class of the `requests` library.
In certain cases, this asynchronous flow doesn't work and the sandbox will instead synchronously call an exported JS method:
- When reevaluating a single cell to get a formula error, the request is made synchronously.
- When a formula makes multiple requests, the earlier responses are retrieved synchronously from files which store responses as long as needed to complete evaluating formulas. See https://grist.slack.com/archives/CL1LQ8AT0/p1653399747810139
Test Plan: Added Python and nbrowser tests.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Subscribers: paulfitz, dsagal
Differential Revision: https://phab.getgrist.com/D3429
Summary:
After the welcome questions are dismissed, a video tour modal will
now be displayed. The video tour is also accessible via a tool button
in the left panel of the home page, as well as a text button next to
the Examples & Templates header.
Test Plan: Browser tests.
Reviewers: dsagal
Reviewed By: dsagal
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D3477
Summary:
- Substantial refactoring of the logic when the server fails to send some
messages to a client.
- Add seqId numbers to server messages to ensure reliable order.
- Add a needReload flag in clientConnect for a clear indication whent the
browser client needs to reload the app.
- Reproduce some potential failure scenarios in a test case (some of which
previously could have led to incorrectly ordered messages).
- Convert other Comm tests to typescript.
- Tweak logging of Comm and Client to be slightly more concise (in particular,
avoid logging sessionId)
Note that despite the big refactoring, this only addresses a fairly rare
situation, with websocket failures while server is trying to send to the
client. It includes no improvements for failures while the client is sending to
the server.
(I looked for an existing library that would take care of these issues. A relevant article I found is https://docs.microsoft.com/en-us/azure/azure-web-pubsub/howto-develop-reliable-clients, but it doesn't include a library for both ends, and is still in review. Other libraries with similar purposes did not inspire enough confidence.)
Test Plan: New test cases, which reproduce some previously problematic scenarios.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D3470
Summary:
This addresses a rare bug where xls files with invalid dimensions
could not be imported into Grist due to how openpyxl handles
parsing them.
Test Plan: Server test.
Reviewers: alexmojaki
Reviewed By: alexmojaki
Differential Revision: https://phab.getgrist.com/D3485
Summary:
For self-hosted Grist, forward auth has proven useful, where
some proxy wrapped around Grist manages authentication, and
passes on user information to Grist in a trusted header.
The current implementation is adequate when Grist is the
only place where the user logs in or out, but is confusing
otherwise (see https://github.com/gristlabs/grist-core/issues/207).
Here we take some steps to broaden the scenarios Grist's
forward auth support can be used with:
* When a trusted header is present and is blank, treat
that as the user not being logged in, and don't look
any further for identity information. Specifically,
don't look in Grist's session information.
* Add a `GRIST_IGNORE_SESSION` flag to entirely prevent
Grist from picking up identity information from a cookie,
in order to avoid confusion between multiple login methods.
* Add tests for common scenarios.
Test Plan: added tests
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3482
Summary:
When an account is upgraded to a new product in Billing, send a message to the redis channel `billingAccount-${accountId}-product-changed`.
ActiveDocs subscribe to this channel. When a message is received, they refresh their product from the database and use it to recalculate doc usage based on new limits. The new usage is broadcast to clients so they see the result of the upgrade live.
Test Plan: Extended nbrowser Billing test to test that a document open in a separate tab has its limit banner cleared immediately on upgrade.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D3480
Summary:
- Also converted sandboxUtil to typescript.
- The issue with %s manifested when a Python traceback contained "%s" in the
string; in that case the object with log metadata (e.g. docId) would
confusingly replace %s as if it were part of the message from Python.
Test Plan: Added a test case for the fix.
Reviewers: alexmojaki
Reviewed By: alexmojaki
Differential Revision: https://phab.getgrist.com/D3486
Summary:
This blocks browser back/forward trackpad gestures from unintentionally
triggering when the cursor is over an overflown gridview. The gestures
are still allowed elsewhere in the UI, as well as in gridviews that have
not overflown.
Test Plan: Tested manually.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D3474
Summary:
This fixes the grist-ee build after recent changes, by
giving it a stub for ProductUpgrades.ts. Extends the
`core` test to also check if `ext` variant builds, to
catch the most common form of breakage on grist-ee so
far (file organization).
Test Plan: extends test
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3484
Summary: Use new Banner component for activation messages.
Test Plan: Existing tests.
Reviewers: paulfitz
Reviewed By: paulfitz
Differential Revision: https://phab.getgrist.com/D3483
Summary:
Login and error pages now have their own unique page titles. This also fixes
the bug with the signed-out page having a page title of "Error".
Test Plan: Browser tests.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D3479
Summary:
A formula returning an empty RecordSet in a RefList columns results in storing [] instead of null.
This caused a bug where the empty list was 'flattened' and the cell not appearing in filters at all.
This diff fixes the bug by filtering for the default value `null` instead for RefLists and the empty string for ChoiceLists.
I didn't manage to actually reproduce the bug for ChoiceLists, but this seemed the most sensible thing to do.
Test Plan: New nbrowser test.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3478
Summary:
When a table was selected by a summary table, renaming that table using
section widget resulted in a javascript error.
Test Plan: new test
Reviewers: alexmojaki
Reviewed By: alexmojaki
Subscribers: alexmojaki
Differential Revision: https://phab.getgrist.com/D3475
Summary:
Adds some special handling to summary table and lookup logic:
- Source rows with empty choicelists/reflists get a corresponding summary row with an empty string/reference when grouping by that column, instead of excluding them from any group
- Adds a new `QueryOperation` 'empty' in the client which is used in `LinkingState`, `QuerySet`, and `recursiveMoveToCursorPos` to match empty lists in source tables against falsy values in linked summary tables.
- Adds a new parameter `match_empty` to the Python `CONTAINS` function so that regular formulas can implement the same behaviour as summary tables. See https://grist.slack.com/archives/C0234CPPXPA/p1654030490932119
- Uses the new `match_empty` argument in the formula generated for the `group` column when detaching a summary table.
Test Plan: Updated and extended Python and nbrowser tests of summary tables grouped by choicelists to test for new behaviour with empty lists.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3471
Summary:
- Showing nudge to individual users to sign up for free team plan.
- Implementing billing page to upgrade from free team to pro.
- New modal with upgrade options and free team site signup.
- Integrating Stripe-hosted UI for checkout and plan management.
Test Plan: updated tests
Reviewers: georgegevoian
Reviewed By: georgegevoian
Subscribers: paulfitz
Differential Revision: https://phab.getgrist.com/D3456
Summary:
Removes the relevant links in the intro text and buttons.
Note that the presence of actual "Examples & Templates" section of the page is controlled by whether any templates are available (returned by `getTemplates` api call)
Test Plan: Tested manually
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3473
