Remove visual noise from cui

Change-Id: I6cec1f747ce57c3153af92e9e0c317d34d5a245d
Reviewed-on: https://gerrit.libreoffice.org/8250
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>