(core) Add attachment and data size usage

Summary:
Adds attachment and data size to the usage section of
the raw data page. Also makes in-document usage banners
update as user actions are applied, causing them to be
hidden/shown or updated based on the current state of
the document.

Test Plan: Browser tests.

Reviewers: jarek

Reviewed By: jarek

Subscribers: alexmojaki

Differential Revision: https://phab.getgrist.com/D3395

app/common/ActionGroup.ts

@@ -25,5 +25,4 @@ export interface ActionGroup extends MinimalActionGroup {
   user: string;
   primaryAction: string;  // The name of the first user action in the ActionGroup.
   internal: boolean;      // True if it is inappropriate to log/undo the action.
-  rowCount?: number;
 }