bug#56305: 29.0.50; 'yes-or-no-p' deselects minibuffer frame

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 5 Jul 2022 15:59:00 +0000
> Cc: rudalics@gmx.at, monnier@iro.umontreal.ca, 56305@debbugs.gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> > > After typing C-x C-c, rather than exiting, this particular Emacs
> > > prompts:
> 
> > >     "Active processes exist; kill them and exit anyway? (yes or no) "
> 
> > > on MBF and it opens a window *Process List* on NF.
> 
> > Sounds right to me: the frame where Emacs presents some important
> > information has focus.  If you think this is wrong, please tell why.
> 
> Well, I don't have a firm opinion on this, but yes-or-no-p is an active
> function, here.  We always leave the minibuffer as the selected window
> for this function, certainly when we've a normal minibuffer in the frame.
> Why should it be different when we've got a minibuffer-only frame?
> 
> Also, the mechanism by which NF gets the focus in the bug scenario
> appears to be random.  When the focus starts out in NF and we do C-x C-c,
> the focus moves to MBF.  This is inconsistent.
> 
> The place where the randomness takes effect is the 
> 
>     Fredirect_frame_focus (gfocus, frame);
> 
> in do_switch_frame I drew attention to yesterday.

Do you have a suggestion for a change there to improve the behavior?