UI Accessibility Improvements: Pull down menus throughout site do not indicate their function as a pull down menu or announce changed state once selected

Problem:
Pull down menus throughout site do not indicate their function as a pull-down menu or announce changed state once selected.

For example, in the "More Actions" pull-down menu (shown above), there is no cue that this is a pull-down menu or an announcement that the menu has been opened.

Solutions:
Add ARIA to indicate menu role and state of expand or collapse.

For example, in the “more actions” pull down menu, we would start by adding aria- haspopup="true" and aria-expanded=”false” and role = “menu” to the anchor object for the “More actions” link.
<a class="btn btn-medium btn-block dropdown-toggle" href="#" data-toggle="dropdown" aria- >
More actions
<span class="caret"></span> </a>
Adding a JavaScript action (another onclick handler) to change aria-expanded=”true” once the “More action” link is selected would provide feedback to the screenreader that the menu is in expanded mode.