[OR-908] - Show calendar event details in activity stream
Merge pull request #639 in OR/rse from ~PKEWISCH/rse:OR-908-calendar-getevent to master

* commit '537eadbb16ca5626405df65fccbe9f85ca8fde55':
  [OR-908] - Show calendar event details in activity stream
[OR-908] - Show calendar event details in activity stream - fix linters