Feature request: normal emojis autocomplection with :

[MarcAnt01]

Description of feature or change
Typing : in Oxidized has server emojis autocompletion, anyway I'd like this could apply also to other emojis for example :smile autosuggests smile emoji etc.

Rationale
I often use this feature in other messaging apps and I expect this from every messaging app, while typing and including an emoji in between it's very handy to add directly an emoji this way from a keyboard.