bug#50067: Context menus

[Eli Zaretskii]

> From: Mattias Engdegård <mattiase@acm.org>
> Date: Fri, 20 Aug 2021 12:29:46 +0200
> Cc: Eli Zaretskii <eliz@gnu.org>, 50067@debbugs.gnu.org,
>         homeros.misasa@gmail.com, tkk@misasa.okayama-u.ac.jp, larsi@gnus.org,
>         alan@idiocy.org
> 
> In macOS/NS, "titles" as disabled menu entries simply do not exist in the GUI 
> vocabulary and look alien, amateurish, confusing or wrong. The menu is 
> expected to be understood in its context of activation.

Then please propose macOS-specific changes that ignore the menu names
instead of displaying them.  Platform-specific conventions should not
leak into general Lisp data structures.