Translate German comments and terms in sc/source/ui

Change-Id: I20ae58b0b4c6bd2a568d63685019f0f846ef37e2
Reviewed-on: https://gerrit.libreoffice.org/36108Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>