fdo#56562 OSX: Update URL in Writer title bar when saving .doc

Change-Id: I839ee3fd76d9c5666dd7f82cba26596c80ff2602
Reviewed-on: https://gerrit.libreoffice.org/11106
Reviewed-by: Tor Lillqvist <tml@collabora.com>
Tested-by: Tor Lillqvist <tml@collabora.com>
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>