The web client stored each tab's messages and unread count under the
tab's name, and the Server tab was named Server. A user with the nick
Server got a direct-message tab with the same name, so the two tabs
showed one message list.
The Server tab is now stored under "*server*". No nick or channel name
can contain *, so that user's tab keeps its own messages. The tab bar
still labels the tab Server.
Model: opus-5-5