bug#36894: Restore frameset focus and selectedness

[Eli Zaretskii]

> Cc: juri@linkov.net, 36894@debbugs.gnu.org
> From: martin rudalics <rudalics@gmx.at>
> Date: Sat, 17 Aug 2019 10:24:52 +0200
> 
>  > Juri suggested a patch.  Are you okay with it,
> 
> Okay with it.  It should not make things worse.

Thanks.  Juri, please go ahead and push.

>  > or are you saying that
>  > it will still fail in some situations?
> 
> Focus related problems are generally unpredictable.  Each window
> manager under GNU/Linux and each Windows version introduces its own
> ones.  Just for example, here on Windows 10 it's so far completely
> incomprehensible for me to tell whether a window A hidden by a window
> B will get focus when B is deleted.

I guess you are saying that even after this fix thisissue will never
be solved 100%.