[Egyptian] Egyptian picker now supports Unicode 12 formatting characters

[r12a]

I don't know whether anyone uses it, but the picker at
https://r12a.github.io/pickers/egyptian/
has been updated to allow insertion of the new Unicode12 formatting codes.

I haven't announced it widely yet for 2 reasons:

[1] I have begun to upgrade the MDC<>Unicode<>MDC converters, but i need 
to do a little more work there.

[2] I don't have a font that supports the formatting behaviour.

Does anyone know of a font which i can recommend for download, or better 
still, include as a webfont?

ri