Camera flights around the globe

[emackey]

With camera flights attached to the Home button, as per #803, there is some odd behavior on the other side of the globe. From the home position, spin the globe to the opposite side, looking at India, and zoom in about 50%. Then click the home button. The globe actually leaves the screen and comes back.

[pjcozzi]

Now duplicate with #1158. Will update that.