LB-1342
:
After editing chaining provider name selected blog there being reset

Fixed an error on python that appear when the source is updated
LB-1105 Native twitter embeds sometimes not loading
Merge pull request #572 from ioanpocol/liveblog16

LB-1342
Merge pull request #570 from patriciagarcia/LB-1105-liveblog16

LB-1105 Native twitter embeds sometimes not loading
Merge pull request #571 from vladnicoara/liveblog16

LB-1311: "Comment" button is displayed on embed when commenting is tu…
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