(core) Raw renames

Summary:
A new way for renaming tables.

  - There is a new popup to rename section (where you can also rename the table)
  - Renaming/Deleting page doesn't modify/delete the table.
  - Renaming table can rename a page if the names match (and the page contains a section with that table).
  - User can rename table in Raw Data UI in two ways - either on the listing or by using the section name popup
  - As before, there is no way to change tableId - it is derived from a table name.
  - When the section name is empty the table name is shown instead.
  - White space for section name is allowed (to discuss) - so the user can just paste '   '.
  - Empty name for a page is not allowed (but white space is).
  - Some bugs related to deleting tables with attached summary tables (and with undoing this operation) were fixed (but not all of them yet).

Test Plan: Updated tests.

Reviewers: georgegevoian

Reviewed By: georgegevoian

Subscribers: georgegevoian

Differential Revision: https://phab.getgrist.com/D3360

app/client/widgets/NumericTextBox.ts

@@ -56,7 +56,7 @@ export class NumericTextBox extends NTextBox {
     const defaultMin = Computed.create(holder, resolved, (use, res) => res.minimumFractionDigits);
     const defaultMax = Computed.create(holder, resolved, (use, res) => res.maximumFractionDigits);
     const docCurrency = Computed.create(holder, docSettings, (use, settings) =>
-      settings.currency ?? LocaleCurrency.getCurrency(settings.locale)
+      settings.currency ?? LocaleCurrency.getCurrency(settings.locale ?? 'en-US')
     );
 
     // Save a value as the given property in this.options() observable. Set it, save, and revert