Allow interrupting auto-rotate to place location

[cletusw]

Steps to reproduce:

1. Search for a place name to get a pink dot somewhere
2. While the globe is rotating to that place, click and drag to try to rotate somewhere else
3. Notice the globe gets super jittery and refuses to cooperate.

Also,

1. After the auto-rotate is done, rotate somewhere else.
2. Change the "years ago" using the arrow keys or the dropdown.
3. The globe tries to rotate back the selected place and doesn't allow interrupting it.

It might make sense to have clicking interrupt the auto-rotate to allow the user to go where they want. And/or maybe make the auto-rotate a lot faster. If that's not what you want, then maybe click and drag should be disabled during auto-rotate so it doesn't get super jittery.

Since the place locations almost always change between epochs, the auto rotate makes it hard to get a sense for the movement of the continents over time, especially if you tap the right or left arrow multiple times in a row quickly. Maybe there could be a toggle button to disable "auto-rotate to place location" just like there is to disable the globe rotation.