edx/edx-platform — pull request #2733 by gwprice (2014-02-26 16:47:18+00:00)
Title: Improve UX of pinning feature

Students no longer see a tooltip nor any button affordance (i.e. cursor
and color change on hover/focus) on the pinning feature. For moderators,
the tooltip is now correct when a thread is pinned, and the button is
accessible for keyboard-only users and screen readers.

JIRA: FOR-192