Removed several data migrations so migrations run again completely

also deleted unused personas dump
Constrain some permissions fields to be constantly false
Permissions overhaul: removed revoke behavior of userperm.
Reverting to firefox for apply_to_all.feature
Fix entrusted_resources: with out public permissions
Switching to firefox for admin_previews.feature
Refactoring dropping aggregated permission in dialog
Destroying meaningless group/userpermission within update action
Domina meta, testing completeness of tests
Domina: changed substitions to only appear in values, never keys
Feature test batch edit: enable feature test on ci
Fix: apply scrolldown only to dropdown not to dropup
Added @poltergeist_debug to the capybara drivers
Added sql queries to worksheet for counting empty permissions
Implemented batch_edit feature tests
Show presets with manage permission (like Bevollmächtigter) as option for Userpermission
Fix Permission Dialog: show that user belongs to group also when adding new group
Permissions dialog: setting isCurrentUser when current_user is added
Fix permissions dialog: current user can be added
Permissions dialog: displaying current user icon for user;

Refactored to use css also for groups