Opening "normal" windows (non-maximized) windows was hanging.
Blender was waiting for a "configure" event with a valid size,
which stopped being sent in GNOME-49.
Even though GNOME-49.1 will resolve the problem, according to the
GNOME developers Blender's use of Wayland was incorrect.
Resolve the issue with the following changes:
- Don't wait for the `xdg_toplevel` to be when creating new windows.
Instead, defer setting the window state using logic that was already
used for Vulkan.
- Set new window's pending size - used if no size is received
from LIBDECOR's "configure" callback.
- When the window is "configured" always set the window "state"
even if the size is not yet known.
Ref !148104
5f72d112dd