BugID: 33724 - Page needs to reload after forced log-in

The fix addresses no reload on closing 'join the chat'
modal window after logging in from forced login modal.

There were also four changes done when fixing this:
1) inline JS removed from template
2) unnecessary and non-existent image removed from template
3) small refactoring of ChatEntryPoint.js to reduce nesting
   and increase readibility
4) introduced throbbing on forced log-in modal when waiting
   for server reply