- added new ComponentChangeEvent type: GRAPHIC
- does not change the rocket structure, nor behavior, but requires updates to the UI
- removed event handling from FlightConfiguration
- caused a circular event loop
- also, collected too many responsibilities in the class (bad code smell)
- minor refactor of event handling in Rocket. (no change in behavior)
- Fixed StageSelector behavior
- should now pull selected configuration from rocket
- should now correctly notify rocket (and indirectly, the graphics)