so can't use cancel because focus out of the entry happens on
the effort to get to the cancel button
instead only show the dialog on ok, next and selecting a new
param in the treeview. Show an error indicator in the entry
on focus-out instead.
Change-Id: I5770142d7a1e7c62bb9ed89a171e72129a43f6c8
Reviewed-on: https://gerrit.libreoffice.org/82613
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>