Remove visual noise from svx

Change-Id: I56497d953b0500ba0967fddb36ca8bbbe86c62ad
Reviewed-on: https://gerrit.libreoffice.org/8321
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>