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
Implement new learning content navigation/layout
* Fix first part of cypress tests
* Add event bus type to fix typecheck
* Rework SelfEvaluation to support new layout
* Fix layout
* Hide lang switcher icon in lc footer
Closes https://iterativ.atlassian.net/browse/VBV-319
* Fix cypress tests
* Unregister event bus handler
* Hide ItNavigationProgress on self evaluations with
only a single step
* Last fixes
* Merged develop into feature/new-lc-navigation