macos: make move_resize possibly idempotent

macos: make move_resize possibly idempotent

We need to handle the case where we might be racing against an incoming
configure event due to how notifications are queued from the display
server. Rather than calling configure (and possibly causing other things
to move around) this just queries the display server directly for the
coordinates that we care about.

Additionally, we can display:NO as we are in control of all the display
process now using CALayer.