since...

commit e54762ba
Author: Caolán McNamara <caolanm@redhat.com>
Date:   Tue Apr 16 17:17:58 2019 +0100

    weld ScTPValidationValue and ScValidationDlg

the inc/dev modality on show/hide isn't desirable anymore

Change-Id: I5bf908871986160de61508c9678495d0d5a8296d
Reviewed-on: https://gerrit.libreoffice.org/71426
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>