Update Onyx with removal of trailing spaces and some JSHint style cleanups, including a couple of global leaks that hadn't been detected.

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@palm.com)
Update onyx.Item to use new API, addRemoveFlyweightClass, that simplifies the code needed to toggle this class.

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@palm.com)