RevoCalibration: Get rid of this UAVO and roll into SensorSettings

InertialSensorSettings was renamed to SensorSettings since Mag is not
inertial which is what caused most of the LOC changes.
GCS Calibration: Use SensorSettings instead of InertialSensorSettings
Merge pull request #438 from peabody124/revo_calibration_next

Move Magnetometer calibration into SensorSettings