This change updates Djblets to use the latest versions of jQuery and

jQuery UI. The changes here are pretty straightforward:

bind and unbind have been removed in favor of their indentical and

  better-named on and off.
A change to event propagation made it so the DOMSubtreeModified

  handler inside ModalBox was causing an infinite recursion. The

  recommended way to do this sort of thing these days is with a

MutationObserver, so I've ported the code over to use that.
The way that widget data is named changed, so the data key for

  the modal box changed from modalBox to uiModalBox.

This also includes a fix for the backbone JS template to update to the

latest version of that, which doesn't have any impact on code that

uses it.

Ran Review Board's js-tests suite.
Tested inline editors and the modal box.