fdo#39468 Translate German comments, clean some ws

Change-Id: I4a9b3b3e0d0fefb18808b0b045ffcf3531f4ea28
Reviewed-on: https://gerrit.libreoffice.org/11524
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>