SOS-1528 Front-end changes to interpret SocialActivitySet.
SOS-1528 Fix Language keys
SOS-1528 S/F
SOS-1528 SF
SOS-1528 Compat for 6.1
SOS-1579 rename view_activities to view_activities_feed and duplicate file for activity sets
SOS-1579 rename view to view_activities and duplicate file for activity sets
SOS-1579 No activities are shown if social.activity.sets.enabled=false