Retry in all the right/possible places. Don’t freak out about things
coming in unknown sequences.

Instead us a Toolbox concept which hangs off of QGCApplication

- Fixed found bugs in MissionManager

- Fixed bugs found to unit test

- fix bugs found by test
- Implemented Mock mission item protocol in

Plus lots of other cleanup

Handy for testing without a real board

Fully working waypoint interface, thoroughly tested. Active waypoint setting has to be debugged in the simulator, but works fine on real hardware

Working on better simulation implementation, fixed a bug where the port handle was not fully released