fdo#39468 Translate German comments: sw/source/filter/ww1

There was still one untranslated paragraph left.

Change-Id: I9b951c5216560614bd3fc42f9118477ad66cbdf2
Reviewed-on: https://gerrit.libreoffice.org/8385
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>