[add] Permission "Can self delete"
[add] Option: After requesting the deletion Logout takes place
[add] Option: After a new login, the cancellation of the deletion takes place
[add} Option: User group for pending deletions
[add] Option: Delete Account or disable
[add] Option to move a disabled account to another group
[add] E-Mails for: Account deletion -> scheduled, cancelled, completed
[add] Anonymization of User data
[fixed] Slow Member-List
[fixed] Many optimizations and minor bugs fixed
