[Applications] Persist comment rating average to database and update automatically

(refs #5158, gh-33)
[Applications] Adds CLI command to (re)calculate rating.

(refs #5158, gh-33)
[Applications] Adds rating to list view and make it sortable

(refs #5158, gh-33)
[Core] Improves paginator creation controller plugin
[Applications] Adds german translations

(refs #5158, gh-33)
Merge branch 'feature/Applications-list_sortable_by_rating' into develop