BUG: /quits causing duplicate lowercased channels to show up in client

Hi there -- Thanks for this great client. Found a small bug that can be reproduced locally by joining as user1 in one browser and user2 in a second browser. When user2 disconnects (msg: /quit), was seeing in user1's client a bug where a duplicate lowercase channel had been created. This was because the channel key was being sent on the quit message rather than the channel's 'serverName' property.