Remove visual noise from wizards

Change-Id: I27c730fa18b665bffe8c8d032fa51680cbbb2dd5
Reviewed-on: https://gerrit.libreoffice.org/8341
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>