instead of assuming they are in their final position when the
top level dialog resizes. Cause there's a timer/idle involved
so the final position isn't known yet

(cherry picked from commit d4d4e00a)

Change-Id: I713e938b0e275f181514315cb4ce4531f36191ca

loplugin:vclwidgets

(cherry picked from commit 4882664e)

Change-Id: I3e5d88bdc2ecae6164c75da8ddf1b8cfe0ed325f
Reviewed-on: https://gerrit.libreoffice.org/19796Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>
(cherry picked from commit 6213ce4a)