Translate some old german comments

I doubt that they will actually be useful, and I mostly don't understand what
they are supposed to mean, but it's still better to have them in english.

This changeset is meant as a test patch. I intend to do a few more translations
if this goes well.

Change-Id: I6530501b1307aef352dcc851f6536645afeaaebf
Reviewed-on: https://gerrit.libreoffice.org/7343
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>