Corridor Scan: applyNewAltitude support

UDP Change

Plus various bug fixes from flight testing

Corridor Scan: Support for images in turnaround

Fix multiple selected state for offline maps buttons.

More work on better unit tests

And fixes they found

Complex item unit test work

Clickable deadzone

Maintain a list of address/port pairs instead of a address/port map.

Minor improvement to detection of stick recentering after calibration. Without this if you performed a calibration with deadband enabled but one of the deadbands at the end of the calibration was ~0 it would be very difficult to position the stick so that Qgroundcontrol considered the axis to be centered.

recentered after calibration.

Made it so that raw axis monitor indicators are narrow so that they don't obscure view of the deadzones.

New TransectStyleComplexItem base class

Terrain: Better logging for errors

Terrain crash

Allow loc of radios string

Support HIGH_LATENCY2.failure_flags