Bugfix/VBV-470 Homogenisierung Abgabe Aufträge
* Make feedback non-checkable without submission
* Submit preparation_assignment on close
# Conflicts:
# client/src/pages/learningPath/learningContentPage/assignment/AssignmentView.vue
* Also submit reflection on close
* Fix CourseSessionCompletionData reloading
* User can self toggle LearningContentFeedback completion
* Show submission view for all assignments
* Fix cockpit for condition acceptance
* Close assignments after submission
Approved-by: Dario Aebersold
Approved-by: Daniel Egger