qnd: support for logout.


git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/trunk/on-premise/all@93620 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
qnd:
- Support logout
- Error message in red
- Other minor stuff


git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/backend/server/trunk/on-premise/all@93621 6b8eccd3-e8c5-4e7d-8186-e12b5326b719