GlobeControls: Orthographic camera can get into a bad state

[gkjohnson]

Transitioning to ortho camera can result in a blank camera view and subsequently can cause the camera to spin out of control. Need a repro position.

[gkjohnson]

Possibly due to transitioning from too far a distance? The perspective camera can wind up under the terrain

[gkjohnson]

Can't repro, now, possibly due to some recent transition changes.