HIG fixes for vcl

Change-Id: I7ab2aa906073f0ea09ca4e3e4ae1d5346f6e7616
Reviewed-on: https://gerrit.libreoffice.org/12499
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>