Activate empathy when clicking on a chat icon by asking the
ChannelDispatcher to open the conversation in the default handler.
Also, remove the Approver and Handler for now, since until
telepathy-logger is stable, this means Empathy won't see (and log)
those conversations. This means that empathy's blinky status icon is
back; we'll have to do something else about that.
https://bugzilla.gnome.org/show_bug.cgi?id=611610
2bd64b6cab