(core) Add usage to data tables page

Summary:
Currently, usage is only shown for free team sites, and only
for total number of rows used in a document. Future diffs will
include other usage metrics and browser tests.

Test Plan: Planned for future diffs; UI is still under development.

Reviewers: jarek

Reviewed By: jarek

Subscribers: alexmojaki

Differential Revision: https://phab.getgrist.com/D3343

app/client/ui/Tools.ts

@@ -31,14 +31,6 @@ export function tools(owner: Disposable, gristDoc: GristDoc, leftPanelOpen: Obse
   return cssTools(
     cssTools.cls('-collapsed', (use) => !use(leftPanelOpen)),
     cssSectionHeader("TOOLS"),
-
-    // TODO proper UI
-    // cssPageEntry(
-    //   dom.domComputed(docPageModel.rowCount, rowCount =>
-    //     `${rowCount} of ${docPageModel.appModel.currentFeatures.baseMaxRowsPerDocument || "infinity"} rows used`
-    //   ),
-    // ),
-
     cssPageEntry(
       cssPageEntry.cls('-selected', (use) => use(gristDoc.activeViewId) === 'acl'),
       cssPageEntry.cls('-disabled', (use) => !use(canViewAccessRules)),