Signify custom emoji elements with class

[Gargron]

There is no way to tell a custom emoji from a standard emoji in the CSS. Standard emojis use a spritesheet, while custom emoji use a single image. But because both are rendered the same, you can't style them differently to make sure custom emojis look correct.

[Gargron]

I believe essentially custom emojis need background-size: contain to look correct.

[EtienneLem]

Thanks, currently looking into that. Will try to add another class when custom too