Ping360 head orientation display option

## Summary
Would be good to have a 'Perspective View' option to set the roll and pitch angle of a Ping360, and warp the plot display accordingly.

## Additional information
- Could display white/light on the side that's upwards, and black/dark on the side that's downwards
- Would enable 'birds eye' view of response/distances when [viewing the seabed](https://bluerobotics.com/learn/understanding-and-using-scanning-sonars/#viewing-the-seabed)

- Could also integrate ROV pitch/roll when mavlink connected


@patrickelectric I'm not sure how difficult it would be to develop a feature like this. Presumably the black/white background to indicate down/up would be relatively easy, but not sure about the projective transform/directional shrinking of the polar plot (may not be too bad, depending on how the polar plot is implemented at the moment).