fdo#39468 Finish German comment translation of /svl/source/items

Conflicts:
	svl/source/items/itemset.cxx

Change-Id: I8d1bd1a1889eede2cdb69e06c127b96842116b1c
Reviewed-on: https://gerrit.libreoffice.org/10533
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>