r21808: - Fix a nasty bug in the finite state machine that allowed an event from a

r21808: - Fix a nasty bug in the finite state machine that allowed an event from a
  non-handled widget to be processed as if the event originated from a handled
  widget.  This was allowing the appear event for the module's canvas in
  Mimir's Net Manager (an event which was not handled) to load the tree,
  followed by the tree appear event (intended to be handled, albeit
  incorrectly -- see subsequent check-in of Mimir's Fsm.js) to again load the
  tree, thus the double entry.

  Wow, the above paragraph is really hard to read. :-)