fdo#39468 Translate German Comments - vcl/source/window/dockmgr.cxx

Conflicts:
	vcl/source/window/dockmgr.cxx

Change-Id: I0af8a95eab8b05752bb4497295d26b717021d3fd
Reviewed-on: https://gerrit.libreoffice.org/8169
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>