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

[Eli Zaretskii]

> From: Ken Manheimer <ken.manheimer@gmail.com>
> Date: Mon, 20 Jul 2020 14:58:01 -0400
> Cc: 42218@debbugs.gnu.org
> 
>  The emacs-27 branch should only get documentation fixes and very safe
>  bugfixes for serious bugs.  Other than that, please don't push
>  anything there; when in doubt, please ask.
> 
> 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, I don't think it is really needed
on emacs-27.

> It would be useful to add something like what you said in the "Backporting to 
> the release branch" section of
> admin/notes/git-workflow. 

This is described in CONTRIBUTE; git-workflow is not the right
document for these issues.

Thanks.