Another pretty large commit, sorry guys... I'm willing to do the merging if there are any annoying conflicts!
- Overall layout improvements
- Correct the social buttons
- Running detail view now showing a result table of all participants, if the event is passed
- Possible actions also accessible from the detail view, not only from the table in index view
- Add some more permission checks in the running controller... I guess we need to define the permissions and put this logic into the parent class (SportSessionController)