Automattic/_s — pull request #493 by davidakennedy (2014-05-15 02:33:46+00:00)
Title: Adjust dropdown menu styles so they work with screen readers

Currently, screen reader users cannot access the menu links in the main navigation because of a `display: none;` used on the `ul` elements.

This pull request does two major things:

* Changes dropdown menu styles to position them offscreen so screen reader users can still access the links.
* Brings the dropdown menu techniques more in line with how they're done in Twenty Fourteen.