bug#29478: [Patch] bug#29478: 26.0.90; `C-h k' followed by mouse clicks no longer shows down event

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: Eli Zaretskii <eliz@gnu.org>, 29478@debbugs.gnu.org,
>         npostavs@users.sourceforge.net
> Date: Sun, 24 Dec 2017 01:52:26 -0500
> 
> Here's another take on this problem (clearly not intended for emacs-26).
> 
> This is also able to provide help on double/triple mouse clicks
> (tho I had to resort to ztree to test it because such bindings are very
> rare).
> 
> What do you guys think?

This patch doesn't apply to the master branch, so I couldn't test it.

Thanks.