802c2fe532
It's important to update the allocation of the parent before allocating
its children, it's an assumption we make in a lot of places.
This broke resource scale calculation for boxpointers and their
children when multiple monitors with different scales are used and the
primary monitor is not positioned at x=0, y=0.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/1615
(cherry picked from commit 63a0e521fd)