queue_resize needs to invalidate the size cache even
if there is a pending layout idle awaiting

Change-Id: I6dba3d37fbb33125cc3f5d17aff6d2f7a3388654
(cherry picked from commit d40d756f)
(cherry picked from commit c3a4bfcb)
Reviewed-on: https://gerrit.libreoffice.org/20374Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
(cherry picked from commit f307d1a0)