gregbell/active_admin — pull request #2815 by sandrew (2013-12-23 08:31:12+00:00)
Title: Dropdown menu on click navigates to top of the page

Default dropdown_menu button has a `href='#'`, so when you click it, it opens menu and navigates to top because it opens '#' anchor.
This fix adds `preventDefault` analogue in jQuery (`return false`), so it prevents opening this anchor and page scrolling stays where it was.