Speed and Altitude units

[BrettMayson]

When merged this pull request will:

• Add additional speed units

  • km/h
  • mph
  • kn
  • m/s

• Add additional altitude units

  • meters (m)
  • feet (f)

• Display altitude to 1 decimal place below 10

[commy2]

Is this worth it to have two (or more) PFH running each frame?
Can this be optimized to have no PFH running in case the settings match Arma default units?

[BrettMayson]

It could be modified to use no PFH at the cost of complication. When in a land vehicle there will be a single PFH running, in aircraft there will be 2.

[commy2]

Is the control actually deleted when leaving the vehicle, therefore is there the PFH only running when inside the vehicle and it stops when leaving the vehicle?

[Max255PL]

Since this modifies the altitude display already, would it be possible to have both ASL and AGL measurements shown at the same time in all aircraft?
This was a feature back in ACE2 (along with a UI variometer), random pic showing this: https://i.ytimg.com/vi/oLnRu10thKY/maxresdefault.jpg
(ASL middle right)

[Max255PL]

Found a bug with this, when controlling UAVs the UI is still getting the player position instead of the drone. Result as expected.

[commy2]

All vehicle ACE_player should be cameraOn.

[BrettMayson]

Since this modifies the altitude display already, would it be possible to have both ASL and AGL measurements shown at the same time in all aircraft?
This was a feature back in ACE2 (along with a UI variometer)

This PR is not really modifying the UI, and there is unfortunately not enough space to add these in. It's something I'd be interested in adding but it might be better suited for an aircraft orientated mod like AWEsome since it will require modifying the look of the UI to add room. At the very least it should be a different PR if it is to be added to ACE.