Update to the latest jQuery/jQuery UI.

Review Request #9713 — Created March 1, 2018 and submitted March 9, 2018, 4:24 p.m.

Description

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.

Testing Done


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

Issues

Description	From	Last Updated
No trailing comma (this isn't an ES6 file).	chipx86	March 2, 2018, 1:20 p.m.
Wanna change to single quote strings in these files while here?	chipx86	March 2, 2018, 1:21 p.m.
This should probably be in the other change.	chipx86	March 1, 2018, 3:04 p.m.

flake8 passed.

JSHint passed.

djblets/static/djblets/js/jquery.gravy.modalBox.js (Diff revision 1)
Show all issues
```
No trailing comma (this isn't an ES6 file).
```
djblets/static/djblets/js/jquery.gravy.modalBox.js (Diff revision 1)
Show all issues
```
Wanna change to single quote strings in these files while here?
```

djblets/util/templates/js/backbone.html (Diff revision 1)

Show all issues

This should probably be in the other change.

Oh that's Review Board only.

Were there any Backbone changes needed in Djblets for the options stuff? If not, maybe update the summary/description to just mention Backbone too.

No other changes necessary. Djblets has very few backbone things.

		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.

-	da89e0b2b9c3ead2c31043372160fd78f70d13b3
+	9892cd1eba498d8308ad7a05ffb30daf6a2b16b8

	djblets/static/djblets/js/jquery.gravy.inlineEditor.js
	djblets/static/djblets/js/jquery.gravy.modalBox.js
	djblets/static/djblets/js/jquery.gravy.util.js
	djblets/util/templates/js/backbone.html
	djblets/util/templates/js/jquery.html
	djblets/util/templates/js/jquery-ui.html

flake8 passed.

JSHint passed.

Ship it!

Pushed to release-2.0.x (78ee1ac)

You have a pending review.