bug#17408: 24.4.50; tooltips make ms-window go top

[Eli Zaretskii]

> Date: Mon, 05 May 2014 17:18:49 +0200
> From: Jarek Czekalski <jarek@jarek.katowice.pl>
> 
> W dniu 2014-05-05 16:47, Eli Zaretskii pisze:
> > What does that mean in practice? How to determine whether a window "is 
> > active" when it accepts Windows messages? 
> 
> Active in sense of WM_ACTIVATEAPP message:
> http://msdn.microsoft.com/en-us/library/windows/desktop/ms632614%28v=vs.85%29.aspx
> 
> Emacs could maintain app_is_active flag using this message.

Patches are welcome, of course.