The RB.DiffFragmentQueueView has been refactored to no longer depend

on the hoverIntent jQuery plugin. This plugin adds mousemove event

listeners to the page. In lieu of this behaviour, the

RB.DiffFragmentQueueView now just checks if the given jQuery object

has the :hover selector.
The view has also been refactored to not use its own mousemove

listeners and to debounce the resize event.
The move to checking selectors has reduced the code complexity and

made it easier to follow.

Verified the controls still worked as expected.