(core) Required fields in forms and bug fixes

Summary:
- Adding little green asterisk at the end of field title.
- Fixing bug on columns component. Adding paragraph as a column and then selecting it was throwing error in the RightPanel
- Fixing boolean column bug in the editor
- Adding (--Choose--) placeholder for dropdowns
- Fixing columns logic: Dragging and dropping columns can unexpectedly add more columns.
- Added favicon and default page title
- Added svg to sync file for electron.

Test Plan: Updated

Reviewers: paulfitz

Reviewed By: paulfitz

Differential Revision: https://phab.getgrist.com/D4172

app/server/lib/DocApi.ts

@@ -1416,6 +1416,7 @@ export class DocWorkerApi {
           throw new ApiError('Form not found', 404);
         }
         const Tables = activeDoc.docData!.getMetaTable('_grist_Tables');
+        const tableRecord = Tables.getRecord(section.tableRef);
         const Views_section_field = activeDoc.docData!.getMetaTable('_grist_Views_section_field');
         const fields = Views_section_field.filterRecords({parentId: sectionId});
         const Tables_column = activeDoc.docData!.getMetaTable('_grist_Tables_column');
@@ -1521,6 +1522,11 @@ export class DocWorkerApi {
         const doc = await this._dbManager.getDoc(req);
         const tableId = await getRealTableId(String(section.tableRef), {activeDoc, req});
 
+        const rawSectionRef = tableRecord?.rawViewSectionRef;
+        const rawSection = !rawSectionRef ? null :
+                           activeDoc.docData!.getMetaTable('_grist_Views_section').getRecord(rawSectionRef);
+        const tableName = rawSection?.title;
+
         const template = handlebars.compile(form);
         const renderedHtml = template({
           // Trusted content generated by us.
@@ -1532,6 +1538,7 @@ export class DocWorkerApi {
           CONTENT: html,
           SUCCESS_TEXT: box.successText || 'Thank you! Your response has been recorded.',
           SUCCESS_URL: redirectUrl,
+          TITLE: `${section.title || tableName || tableId || 'Form'} - Grist`
         });
         res.status(200).send(renderedHtml);
       })