Summary:When navigating from one view to another you can still interact with
the current view. This means that a user can tap a button multiple times and trigger multiple transitions.
The view that is being transitioned off the screen should not be allowed to
receive any user interaction while it is being transitioned.
Reviewed By: javache
Differential Revision: D3143202
fb-gh-sync-id: cc033bbdf0cb9e717f62d2fcf751155406da846c
fbshipit-source-id: cc033bbdf0cb9e717f62d2fcf751155406da846c
eecdf7d356