Theme dialog: fix crash when closing parent first

When we have 'Add' subdialog opened and we close parent
by clicking 'cancel' - subdialog wasn't closed and we had
a crash on next interaction with 'Add' subdialog

Change-Id: I5865a725e93d7c11aa933b7566a7c584018740ca
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/155715
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Gülşah Köse <gulsah.kose@collabora.com>
Reviewed-by: Szymon Kłos <szymon.klos@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/156157
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions