Fixes spec
Adds specs
Removes selection of default activities
Restores default selection
Adds additional specs
Differs between activity view states
Merge pull request #844 from opf/fix/activity_filter_select_3481_2594

[FIX] Activity filter select 3481 2594
Added changelog entry for former PR
Merge remote-tracking branch 'origin/dev' into fix/remove_group_responsibles
Adds changelog entry