(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/client/components/DocComm.ts

@@ -5,6 +5,7 @@ import {ActionGroup} from 'app/common/ActionGroup';
 import {ActiveDocAPI, ApplyUAOptions, ApplyUAResult} from 'app/common/ActiveDocAPI';
 import {DocAction, UserAction} from 'app/common/DocActions';
 import {OpenLocalDocResult} from 'app/common/DocListAPI';
+import {DocUsage} from 'app/common/DocUsage';
 import {docUrl} from 'app/common/urlUtils';
 import {Events as BackboneEvents} from 'backbone';
 import {Disposable, Emitter} from 'grainjs';
@@ -17,6 +18,7 @@ export interface DocUserAction extends CommMessage {
   data: {
     docActions: DocAction[];
     actionGroup: ActionGroup;
+    docUsage: DocUsage;
     error?: string;
   };
 }