font whitelists: add EmojiOne Mozilla

following on from legacy/trac#31141 (moved), least we forget (since that ticket is closed) .... we bundle an emoji font on desktop platforms, so we should at least use it

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cherry picking comments from 31141

gk said

Maybe it would even help with legacy/trac#18172 (moved) and legacy/trac#20842 (moved)

cyberpunk said

Before: Emoji Support: ~612/2575 After: Emoji Support: ~2341/2575

thorin said

TB: all black and white TB with EmojiOne Mozilla: all colorful and more detailed