bug#52973: Adding a few context-menu-mode commands

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: philipk@posteo.net,  52973@debbugs.gnu.org
> Date: Thu, 06 Jan 2022 10:20:10 +0200
> 
> > Telling the user to do more customizations _after_ turning on
> > context-menu-mode makes little sense to me.
> 
> There are hundreds of user variables for customization,
> and the context menu variable is not different.

I couldn't disagree more.