Merged r11613 from trunk to 2.3-stable.
Fixing HTML in groups index view.
Contributed by Gregor Schmidt.
Merged r11615 from trunk to 2.3-stable (#13458)
Bulgarian translation ordered by Ivan Cenov.
Merged r11614 from trunk to 2.3-stable (#13450)
Czech translation changed by Karel Pičman.
Merged r11556 from trunk to 2.3-stable (#13391)
Bulgarian translation ordered by Ivan Cenov (#13458)
Czech translation changed by Karel Pičman (#13450)
Fixing HTML in groups index view
Use #count instead of #size.
Log errors when bulk edit/copy fails (#13440).
Always instanciate a relation.