Handle parameters not being available

Contrast and Gadget tweaks

Resource cleanup

- All resources are either under src or under resources dirs
- Removed files top level directory
- Move flightgear files to top level dir

Font's are now correctly and equally size across all OS

Use default font wherever possible. Where that doesn’t work, use
ScreenTools::dpiAdjustPointSize.

Airframe config converted to Qml

Primary flight display

New version using QtQuick along with an experimental Map Background

Remove GoogleEarth support

Debug console

Track links using shared pointed

Since debug console maintains a list of links it needs to use shared
pointers so it doesn’t run into the link delete ordering problem.

Add component id support through FactSystem