+New feature: Extended integrity check to look for orphaned old_question tables (Carsten Schmitz)
+New feature: Additional check to find orphaned subquestions in integrity check (Carsten Schmitz)
-Fixed issue: Remove any superflous subquestions on ranking question type before DB migration (Carsten Schmitz)
-Fixed issue: Ranking subquestions are written as ranking type (Carsten Schmitz)
-Fixed issue: Extended integrity check to also catch questions that should not have answer options and should not have subquestions (#5064) (Carsten Schmitz)