Global tasks
   Create new MessageDrop (unconnected)

List of protocols (global)
   add to list
   remove from list

   per protocol:
      Configure
      (dis)connect
      show list of recipients
      add to display
      new Compositor

MessageDrop (several protocols)
   add protocol to this display.
   limit number of messages

   per message:
      start chat (on a given recipient)
      Delete

List of recipients (per protocol)
   talk to one recipient
   auto talkpopup

Compositor (one recipient)
   message only

MessageWidget (one recipient)
   reply
   delete