Steps to reproduce the issue

This is happening on a number of backend forms but for sure on:
Creating a new menu item (I have a lot of categories/articles in my test database at the moment so I can't get back into the Add New Article/Category views at the moment but I'm pretty sure it was happening on both of those).

Basically what you do is open up one of those Add New [Menu Item,Article,Category] screens and then try and hit the Cancel button...instead of Canceling out and returning you to the List view, the first required field is highlighted and you can't leave the page (which to me, isn't the behavior I would expect).

At the moment I haven't taken a closer look to try and see what's happening (if it's simply Google Chrome's form behaviors or if it's the actual Joomla Forms JavaScript), but if it's an issue in our JavaScript it should definitely be fixable.

Expected result

You're returned to the list view.

Actual result

You stay on the Add New screen and the first required field is highlighted.

System information (as much as possible)

Windows, one of the newer XAMPPs running PHP 5.5, Google Chrome, latest version of Joomla checked out from GitHub.

Additional comments