bug#47074: Replace XPM icons with Unicode codepoints in customize/widgets

[Eli Zaretskii]

> Date: Fri, 12 Mar 2021 18:43:44 +0000
> From: Alan Third <alan@idiocy.org>
> Cc: stefan@marxist.se, 47074@debbugs.gnu.org
> 
> > > Simply that we're inserting an image and to change it we'd have to
> > > regenerate it.
> > 
> > Even if some attributes of the image spec reference variables?
> 
> Yes, it's inserted into the buffer as a simple list, I believe, so
> changing the variables doesn't affect the existing image spec.

We could change that, though.  Like supporting :eval in the spec or
somesuch.