Merged r10992 from trunk (#12400).
Merged r10956 from trunk (#12513).
Merged r10975 from trunk (#12566).
Merged r10999 from trunk (#12602)
Korean translation updated by Jongwook Choi.
Korean translation updated by Jongwook Choi (#12602)
German translation updated by Daniel Felix (#10191)
Code cleanup.
Code cleanup in AuthSource controller and views.