Description of feature or change
There could be some kind of indicator in the channel list if someone is currently typing on it.
Mockup
![Oxidized channel list](https://user-images.githubusercontent.com/18747724/118534693-83e6bd80-b717-11eb-8bd8-4b08c1b4bd21.png)
Some kind of marker in here
Rationale
It could make things seem more alive if you knew where people were typing visually.