bug#47969: 28.0.50; Losing minibuffer focus in trying M-x command

[Gregory Heytings]

> > I don't know.  What I do know is that mouse-autoselect-window was 
> > introduced in Emacs 22, and that in Emacs 22-25 the lower window was 
> > not selected with that recipe.  That behavior changed in Emacs 26.
>
> Do you know which commit changed it?

I'll try to find that.

> In either case don't let me distract you and feel free to install any 
> fix you consider reasonable.

I don't have write access to the trunk, and my paperwork is not even 
finished yet :(