[ticket/11387] Log module added only after it has been added

PHPBB3-11387
[ticket/11409] Add success message after updating group position settings

PHPBB3-11409
Merge remote-tracking branch 'EXreaction/ticket/11387' into develop

* EXreaction/ticket/11387:
  [ticket/11387] Log module added only after it has been added
Merge remote-tracking branch 'Elsensee/ticket/11409' into develop

* Elsensee/ticket/11409:
  [ticket/11409] Add success message after updating group position settings