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

[Eli Zaretskii]

> From: Stefan Kangas <stefan@marxist.se>
> Date: Sat, 13 Mar 2021 10:44:46 -0600
> Cc: alan@idiocy.org, 47074@debbugs.gnu.org
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > I don't think names matter in this case, as no one sees them except
> > the source code.
> 
> If we only consider custom.el I agree completely.  But I was personally
> hoping that these "improved" icons will see some use also outside of
> custom, including perhaps in third-party packages.  It would be nice to
> have these better names for such use.

Are they really significantly better?  I fail to see that.

> Would it be okay to just have two names/locations for these XPM files?

Do we have to?

> (I seem to remember that we can't use symlinks due to our support for
> Windows or something?

Symlinks in tarballs are trouble, not only on Windows.

I feel we are again bikeshedding here, sorry.  It's an insignificant
issue from where I stand.