Add instant option to smooth-scroll chat.

[NicosHere]

I'm so glad that smooth chat is back, but in some streams it can scroll in a dizzying way. I think the perfect solution to this would be an option other than slow, medium, fast that makes the messages come in with a small delay between them.

The best way for me to show you what I mean was for me to screen record my Fire TV to show you the difference.

Unsure what I would call this feature but clearly twitch put some sort of delay between each chat so that only one message gets shown at a time rather than how it is on the site, where it just spits out all the messages at once. Let me know if you need more clarification. Thanks again for making such a great extension.