Everything is now based off of default font pixel size

Also adding a constant for the font size in SensorComponent.

If Facts are referenced from FactPanelController, we need to reference
count the AutoPilotPlugin such that it doesn’t get destroyed until
after the FactPanelController is destroyed.

- Download working again
- Fixed lots of bad error handling

Sorting source and headers while at it.

It does not update anything internally. It just moves the path on the screen.

Initial rendering of Waypoints