bug#39379: 27.0.60; Fix for #38457 broke ido-vertical-mode

[Eli Zaretskii]

> Cc: 39379@debbugs.gnu.org, wyuenho@gmail.com
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Wed, 12 Feb 2020 20:24:40 +0200
> 
> > But okay, I'm fine with leaving this bug open, and will try to fix the
> > problem on master.  I do want to install the patch below, because it
> > fixes a problem directly caused by set-minibuffer-message, so we
> > should fix this in Emacs 27.  Any objections?
> 
> None from me. If that's the simplest fix we can do for the release, 
> please go ahead.

Done.