Compass: Set the Pitch for vertical use

first: the compass in locus is a really good feature!

The pitch-scala in the locus compass is calibrated for a horizontal use. But if the phone is used in vertical position (e.g. in a car-holder) the pitch shows unusable values (275 degrees if the phone is exactly vertical). this problem will be solved if the pitch can be set (maybe in a special menu or simply by klick on the pitch-circle) from horizontal to vertical use...