Improve intuitiveness of navigation in globe view when a node is selected

[apike]

Zooming and rotation in the globe view isn't great since it's not inclined to rotate around the equator, and you can zoom through the surface of the globe. When you select a node in the globe view it's even worse, since the camera rotates about the node instead of about the earth.

We should put some restrictions and smarter behaviours on the camera to make this nicer.