Reported by: Mike Goggin <email@example.com>
If you have a DCC window or tab open and a new DCC
event of the same type as the window/tab you have open,
the window or tab will close.
For example: If you have the DCC Send tab open and you
initiate a new DCC Send to someone, the tab will close
itself and you'll have to reopen it to see the send
progress. The same thing happens when you receive DCCs.