fdo#39468 Translate German Comments - sc/source/core/data/documen{4,5}.cxx

Change-Id: I19a2242909dd8519a4819045e039def6e48f2c39
Reviewed-on: https://gerrit.libreoffice.org/12237
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>