bug#36894: Restore frameset focus and selectedness

[Eli Zaretskii]

> Cc: juri@linkov.net, 36894@debbugs.gnu.org
> From: martin rudalics <rudalics@gmx.at>
> Date: Thu, 15 Aug 2019 10:12:17 +0200
> 
>  > I'm not sure I understand what you both are saying.  Are you saying
>  > that this problem is impossible to solve in Emacs?
> 
> If the window manager doesn't comply or is set up "wrongly", yes.
> Focus stealing cannot be handled by the application alone.  But if the
> window manager is compliant, setting the 'no-focus-on-map' frame
> parameter should handle the problem.

Juri suggested a patch.  Are you okay with it, or are you saying that
it will still fail in some situations?

Thanks.