LB-1043: Admin UI ->problem occurs while navigating to 'Manage collaborators' and 'Configure blog'

Fixed
Merge branch 'liveblog16' of https://github.com/sourcefabric/Superdesk into liveblog16
Merge pull request #573 from vladnicoara/liveblog16

LB-1043:Admin UI ->problem occurs while navigating to 'Manage collaborators' and 'Configure blog'