Fixing HTML in groups index view
Contributed by Gregor Schmidt.
Use #count instead of #size.
Log errors when bulk edit/copy fails (#13440).
Always instanciate a relation.
Moves Project#users to a regular method.
Moves Project#principals to a regular method.
Don't verify method.
Merged r11605 from trunk (#13301).
Prevent one query per User#member_of? call after r11508 (#13301).
Merged r11603 from trunk to 2.3-stable (#13447)
German translation changed by Filou Centrinov.
