Starring rooms - Githubissues

Proposed replacement for what's currently "background join":

[x] Rooms can be starred to indicate interest
[x] Interface is now to click a gray star (like hand raising)
[x] Starring maybe persists (but only shows up when that user is joined, as would naturally happen via localStorage transmission)
[x] Clear all stars button?
[x] Sort by number of stars, or filter to show rooms that someone has starred
[x] Filter/Toggle for separating your starred rooms. Ended up using a default-folded nonexclusive section

edemaine / comingle