Refactored PX4 radio config to work with both PX4 and APM

- New mission command editor dialog
- New MissionCommands toolbox object to get command info
- Added APM mission item set

- Pervasive change to automatically connect to known board types
- Lots of additional changes along with this:
- More exposure of objects/properties to Qml
- Much restructuring in LinkManager and LinkManager clients

- Pervasive change to automatically connect to known board types
- Lots of additional changes along with this:
- More exposure of objects/properties to Qml
- Much restructuring in LinkManager and LinkManager clients

- Pervasive change to automatically connect to known board types
- Lots of additional changes along with this:
- More exposure of objects/properties to Qml
- Much restructuring in LinkManager and LinkManager clients

Preparation for auto-connect having no connect/disconnect buttons.

Plus lots of other tweaks to ui for visuals

Mostly accomplished by delay loading Qml elements

For QWidget we will just use the Qt default font sizes. This removes
the extra QQuickWidget creation which breaks boot Qml Profiling