add join widget to the toolbar
In the toolbar perhaps a text box to join a new channel may be added
[connect to irc button] [disconnect from irc button] <-- a large gap --> [ #channel name input box ] @ [ irc networks dropdown ] [JOIN button]
When no channel is specified, join the currently open chat (if it is not joined already).
Currently the join button opens a dialog.
Implementing this would mean that we can join a channel in one click instead of two.