(core) Prevent raw table names from overflowing

Summary:
Modifies CSS so that text overflow is handled by displaying an
ellipsis when raw table names exceed the width of their container.

Test Plan: Tested manually.

Reviewers: jarek

Reviewed By: jarek

Differential Revision: https://phab.getgrist.com/D3524

app/client/ui/WidgetTitle.ts

@@ -43,7 +43,8 @@ export function buildRenameWidget(
           attach: 'body',
           boundaries: 'viewport',
         });
-      }
+      },
+      dom.on('click', (ev) => { ev.stopPropagation(); ev.preventDefault(); }),
     ),
     ...args
   );