fdo#39468 Finish translating German comments in sw/source/core/inc

Change-Id: I9a07a46582eafe70dcc26161e39856e9cf72de0c
Reviewed-on: https://gerrit.libreoffice.org/11792
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>