bug#42218: 28.0.50; Fix for missed item undecoration on allout-widgets-mode deactivation

[Eli Zaretskii]

> Date: Mon, 20 Jul 2020 22:24:49 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 42218@debbugs.gnu.org
> 
> > I'm sorry I didn't wait for your reply, I already pushed to the emacs-27 
> > branch (as well as master). I will avoid
> > committing to a release branch in the future.
> 
> Please revert that commit you made

To clarify: I meant to revert it on emacs-27 only; it should stay on
master.