bug#66947: 30.0.50; Implement missing functions for custom-icon widget

[Stefan Kangas]

Mauro Aranda <maurooaranda@gmail.com> writes:

> tags 66947 patch
> quit
>
>
> Patch attached.

Eli, Mauro has submitted this patch, and proposed it for emacs-29.

Could you please take a look and see what you think?  I'm not myself
familiar enough with cus-edit.el to feel comfortable pushing this to the
release branch.  See also his reasoning in the rest of this thread.

Thanks in advance.