UC-1526 - Add two new user view filters to display Enabled Users and Disabled Users

- added 2 new options to filter tables - ENABLED / DISABLED, works like a search query but without displaying search text
- changed CoreContextImpl.loadUsersByPage, for query like enabled, disabled, ldap query mongo first, extract user ids then load users. Do not load first users and then filter as this will break pagination
- added new method UserProfileService.getUserProfilesByEnabledProperty for retrieving enabled / disabled / ldap user profiles; added methods to count disabled and enabled profiles