(core) Adds dots menu to access rules page item

Summary: In Access rules page item, adds “…” buttons that shows a menu of users to view-as:

Test Plan: Include new nbrowser test

Reviewers: jarek

Reviewed By: jarek

Differential Revision: https://phab.getgrist.com/D3751

app/common/getCurrentTime.ts

@@ -9,5 +9,5 @@ export default function getCurrentTime(): moment.Moment {
   if (typeof window === 'undefined' || !window) { return getDefault(); }
   const searchParams = new URLSearchParams(window.location.search);
 
-  return searchParams.has('currentTime') ? moment(searchParams.get('currentTime')) : getDefault();
+  return searchParams.has('currentTime') ? moment(searchParams.get('currentTime') || undefined) : getDefault();
 }