And other toolbar fixes...

Also reflow settings pane to take less space

- 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

Also friendly editor for MAV_CMD_NAV_ROI and MAV_CMD_DO_SET_SERVO

Joystick: Fix calibration and default use: Do not send anything to vehicle until enabled. Enable after calibration by default.