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

[Stefan Kangas]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Stefan Kangas <stefan@marxist.se> writes:
>
>> I'm less sure about the look of these but they do exist:
>>
>> - ⬤ or ◉ or 🔘 radio button selected (the last one was added to Unicode
>>   in 2015 and gives the hex square here)
>> - ◯ radio button unselected
>
> These look like this here:

◉ seems to pair well with ◯ here too.  So perhaps that could be a
reasonable choice for the radio buttons.

The 🔘 character is fancy, but I don't know what to use for the
non-selected version (and it doesn't display here, so...).