Add a channel when hovering over sub emotes

[ALazyMeme]

In regular twitch chat, when you click on an emote, it will show the channel that it's from

[leon-richardt]

Relevant comment: Chatterino/chatterino2#1765 (comment).
Also, duplicate sibling issue in the Chatterino2 repo: Chatterino/chatterino2#917.

[ALazyMeme]

Relevant comment: Chatterino/chatterino2#1765 (comment).
Also, duplicate issue in the Chatterino2 repo: Chatterino/chatterino2#917.

This isn't a chatterino api related issue, right? It should probably be here.

[leon-richardt]

It makes sense to keep this open; just wanted to link to other relevant issues.