Now the StatusView (bottom-left corner, right below the room list) can
be used to set the nickname and status not only for all accounts at
once, but for managing the status/nick of individual accounts.
AccountManager now can set details of a single account, too.
MainWindow is no longer an Observer (as it just passed the information
along to StatusView― now StatusView manages that itself).
NicknameTextControl was removed, not being in use.
Jaidyn Ann
barrett
plfiorini