Adding .dropdown-menu-right to left aligned element positions menu at right side of screen

Created by: rosskevin

http://v4-alpha.getbootstrap.com/components/dropdowns/#button-elements

If you add .dropdown-menu-right to the live sample, the menu appears across the screen.

JSbin test case(updated): http://jsbin.com/yerepoh/edit?html,output

I'm expecting the menu to be right aligned on the dropdown-toggle.