LB-1163: As an editor, I want to filter posts on chained blog source by verification status and assigned user

fixed also embed.
increased version for embed.
Merge pull request #518 from nistormihai/master

LB-1163: As an editor, I want to filter posts on chained blog source by ...
LB-1243
:
List of the collaborators shows users that are already collaborators
LB-1243
:
List of the collaborators shows users that are already collaborators
Merge branch 'master' of github.com:ioanpocol/Superdesk

Conflicts:
	plugins/superdesk-user/superdesk/user/api/user.py
	plugins/superdesk-user/superdesk/user/impl/user.py