Update template.css to Show Proper Underline on Quick Icons

Makes the hover on Quick Icons links have a proper hover underline rather than one that sticks out to the left.

As seen in the JoomlaCode: http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_id=8103&tracker_item_id=32045

Keep in mind, the GitHub addition is better than the first post on JoomlaCode.