Added Airport Spinner to A/FD view.

I'd like you to go ahead a merge this change.  It works the same way the Plates do.  The selector popups still don't honor night mode (they will have a white background), but it will display the text in night mode or not.

It is going to take more effort to make Night Mode work with black background and white text.  I modeled this after the InfoLines double click selector which has the same issue.  Once I figure something out I'll "fix" all three (Plates, A/FD and the InfoLines selector).