Remove usage of ATTITUDE in favor of ATTITUDE_QUATERNION

UnitsSettings: Use _settingsGroup for SettingsFact creation

Firmware Upgrade: Make default firmware more prominent

Switch OSX build to Qt 5.11.0

Fixed Wing Landing Pattern: Relative alt checkbox override

Clean up SettingsGroup name and settingsGroup

The idea here is to prevent people from accidentally flashing the wrong firmware

Survey: Allow VTOL vehicles to fly alternat transects

Add settingsGroup qualifer to settings override

Update ArduPilot flow URL

Camera/Transects unit tests and fixes

PX4 Optical Flow fixes

Transect alt mode fixes

Sensor Cal: Handle case where no mag present [continued]

Cleanup layout issues throughout QGC

Mavlink Console Improvements

CameraCalc: Image Density -> Ground Res

Adjust to new parameters in Copter 3.6