Added some teaks to 'model.xml'

Change-Id: I85d16d0f4ba40d71fae4444af463441996b80f37
Reviewed-on: https://gerrit.libreoffice.org/11474
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>