(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/ui2018/menus.ts

@@ -537,6 +537,10 @@ const cssCmdKey = styled('span', `
   margin-left: 16px;
   color: ${colors.slate};
   margin-right: -12px;
+
+  .${weasel.cssMenuItem.className}-sel > & {
+    color: ${colors.lightGrey};
+  }
 `);
 
 const cssAnnotateMenuItem = styled('span', `