LB-882: Arrow for choosing feeds type won't work after switching back from Configure Blog

Fixed
LB-1033: No error message is shown when the Facebook app ID is invalid

Fixed
Merge pull request #338 from vladnicoara/invalid-facebook-app-id-message

LB-1033: Invalid facebook app id message
Merge pull request #337 from vladnicoara/updown-nav-problems

LB-882: Arrow for choosing feeds type won't work after switching back from Configure Blog