(core) Add document usage banners

Summary:
This also enables the new Usage section for all sites. Currently,
it shows metrics for document row count, but only if the user
has full document read access. Otherwise, a message about
insufficient access is shown.

Test Plan: Browser tests.

Reviewers: jarek

Reviewed By: jarek

Subscribers: alexmojaki

Differential Revision: https://phab.getgrist.com/D3377

app/client/ui2018/modals.ts

@@ -365,6 +365,7 @@ export const cssModalTitle = styled('div', `
   color: ${colors.dark};
   margin: 0 0 16px 0;
   line-height: 32px;
+  overflow-wrap: break-word;
 `);
 
 export const cssModalBody = styled('div', `