ART.History nav state

[CrypticSwarm]

When an ART.History Widget gets to either end of the history one of the buttons should disable (gray out) which happens. The problem is when you click the button again it re-enables itself. (As seen in ART.History unit test).

[CrypticSwarm]

This fixes the problem directly: http://github.com/CrypticSwarm/art/commit/eea9b33699727063cc85a36a94fb1ef98482dd87
but I'm not sure if there isn't just a way to preventDefault ART behavior of click enabling a widget.