Conflicts:
	src/FactSystem/ParameterLoader.cc

 - Request list of all parameters, expecting device to lead each component with _HASH_CHECK cache value
 - Test for hash collision, if so our cache is valid and respond with _HASH_CHECK to stop listing
 - Else: let listing continue as normal to get updated param values
 - Store each cache by systemID + componentID

For #2586

Move the buglist override to as early as possible, include switches for specific rendering backends on windows

Removed incorrect Vehicle.altitudeWGS84

Also added Center to Mission support

For issue #2776

This allows you to click/add waypoints under the list view

Plumb through initial object mode on Vehicle