[Bug 43009] TIM message manager window covered by an unresponsive window

https://bugs.winehq.org/show_bug.cgi?id=43009

--- Comment #29 from Dmitry Timoshkov  ---
(In reply to lilydjwg from comment #28)
> Oops, I can't login anymore. The login window shows up with animation! (That
> animation exists in Windows but I never saw it in Wine.) But then it seems
> to freeze, and moving mouse over it will hide the mouse cursor. I can close
> it, and it disappears with animation too.

I guess that's how the progress looks like sometimes :)

I'll attach a slightly trimmed down version of the patch that reduces
new functionality only to point_from_window() on the server side, and
leaves visible region calculations intact. Please give it a try.