navigator: add pre mission geofence check
geofence: add simple vertical check
geofence: add DMS coordinate format support for textfile
geofence: do not keep fence in memory
navigator/geofence: add isEmpty() function and checks
navigator/geofence: add parameter to disable geofence
add inflight geofence check, issues warning on gcs for now
launchdetection: add minimal throttle, fix parameter update
launchdetection: rename pre takeoff throttle param and fix usage