(core) Updating RawData views

Summary:
- Better focus on the widget title
- Adding columns only to the current view section
- New popup with options when user wants to delete a page
- New dialog to enter table name
- New table as a widget doesn't create a separate page
- Removing a table doesn't remove the primary view

Test Plan: Updated and new tests

Reviewers: georgegevoian

Reviewed By: georgegevoian

Differential Revision: https://phab.getgrist.com/D3410

app/server/lib/ActiveDoc.ts

@@ -611,7 +611,7 @@ export class ActiveDoc extends EventEmitter {
   public addInitialTable(docSession: OptDocSession) {
     // Use a non-client-specific session, so that this action is not part of anyone's undo history.
     const newDocSession = makeExceptionalDocSession('nascent');
-    return this.applyUserActions(newDocSession, [["AddEmptyTable"]]);
+    return this.applyUserActions(newDocSession, [["AddEmptyTable", null]]);
   }
 
   /**