lok: dialog: check if exists a LOK Window Notifier
When the dialog is about to show, it requires to
send to client side the "created" message. However,
in the constructor has already assigned a notifier
from the parent window.
Change-Id: I1120ad1c1c70449048d6739b8564d1c1f6b1c7e3
Reviewed-on: https://gerrit.libreoffice.org/84908
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Henry Castro <hcastro@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/90243
Tested-by: Jenkins