The Mac driver doesn't normally steal focus, but a press of a hot key counts
as the user giving permission.

Partially based on a patch for winex11 previously submitted by Vincent Povirk.

winemac: Re-sync the window region whenever factors affecting its conversion to Cocoa coordinates change.

Cocoa won't order a minimized window out of the screen list using -orderOut:.
This leaves a window that should be hidden still visible in the Dock, where
it can be unminimized.

The eventual goal is to have a multithreaded implementation of wined3d_cs_ops
and offload some processing to a different thread.