bug#56691: outline-minor-mode displays navigation arrow buttons as emojis

[Po Lu]

So, has there been a conclusion here on what to do or not?
It is really not acceptable for Emacs to display arrow buttons in a form
that depends on the fonts installed on a user's system.  Why can't we
default to what Custom does, which is to use an SVG (or failing that,
PBM) image instead?

I've looked and cannot find a single other program that uses color Emoji
to replace arrow textures, when the latter are possible.