We should replace the navball in IVA

[pleroy]

From the forum:

Is there anyway to have the RPM (IVA) Navball change in the same way as the game navball? Ideally I would like to use exclusively IVA controls and the Principia navball changes currently do not seem to affect the navball that you bring up on internal MFDs

I don't see that we want to mess with other mods (RPM), though.