ES-Alexander

- It would be nice to also be able to show the current depth or terrain-altitude target, depending on the flight mode - idea from @clydemcqueen in [this forum comment](https://discuss.bluerobotics.com/t/auto-altitude-control/6265/25)

- this could also be adapted to show similar concepts for aerial vehicles (e.g. to resolve #177) - we could have a separate widget for this, but the functionality would...

> a 3D rendering of the ROV that shows its orientation in real time — pitch, roll, yaw, and even heading included. I believe all this data is available. @GitTyler805...

[Some relevant inspiration](https://store.steampowered.com/app/3397800/vROVpilot_TITANIC/):

Relevant to #613

IIRC there are a couple of different interfaces that do this, and it is an intuitive way of visualising the pitch as long as the vehicle isn't too rotationally repeating...

Per [internal discussion](https://bluerobotics.slack.com/archives/CB4P9U40H/p1686788553414979?thread_ts=1686686754.821739&cid=CB4P9U40H) it would be helpful to include nice configuration for things like [compass declination](https://docs.bluerobotics.com/ardusub-zola/software/autopilot/ArduSub-4.1/developers/parameters/#compass-dec-compass-declination), particularly since the units for the raw parameter are in radians (which generally requires...

It would also be nice to include an intuitive interface for specifying flight controller [board orientation](https://discuss.bluerobotics.com/t/ahrs-orientation-settings/19398/4) and sensor offsets (e.g. displaying the configured orientation and location via a 3D model...

Similarly for `BARO_ALT_OFFSET`, and ArduSub's `BARO_SPEC_GRAV` and `SURFACE_DEPTH` parameters. [Relevant post for context](https://discuss.bluerobotics.com/t/accessing-depth-information/19401/4).

The interface isn't streamlined for it (i.e. this serves as a workaround), but it's technically possible to have effectively infinite modifier keys now with compound variables.