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.

winemac: When programmatically focusing a window, don't generate WINDOW_LOST_FOCUS event for previously focused window.

That event can confuse things if the program switches focus from A to B and
then back to A and then processes events.  It will get an event saying that
A lost focus in Cocoa, check that A does indeed have current focus in Wine,
and so switch focus away from it (to the desktop window).  (It then gets an
event that B lost focus, but that does nothing at that point.)