bug#56459: 29.0.50; Edebug disables Eldoc

[Eli Zaretskii]

> Date: Wed, 1 Mar 2023 21:19:05 +0200
> Cc: max.brieiev@gmail.com, larsi@gnus.org, 56459@debbugs.gnu.org,
>  friedman@splode.com
> From: Dmitry Gutov <dgutov@yandex.ru>
> 
> > That's a starting point, but I don't think it's enough, because you
> > could switch to another buffer without exiting Edebug.  I tried
> > something like that and it didn't work well enough.  But maybe my
> > testing was incorrect, so if you are confident that this fixes the
> > problem, feel free to install (perhaps on master, though).
> 
> We could try to use more hooks, or give up and use post-command-hook.
> 
> Also switched to looking up edebug-mode instead of edebug-active because 
> the latter is a global value.

SGTM, thanks.