Button label isn't obvious when data-theme="c" and button is :visited. [jquery-archive#777]

Author: louy

themes/default/jquery.mobile.button.css

@@ -5,7 +5,6 @@
 */
 .ui-btn { display: block; text-align: center; cursor:pointer;  position: relative; margin: .5em 5px; padding: 0; }
 .ui-btn:focus, .ui-btn a:focus { outline: none; }
-.ui-btn:visited { color: #fff; }
 .ui-header .ui-btn, .ui-footer .ui-btn, .ui-bar .ui-btn { display: inline-block; font-size: 13px; margin: 0; }
 .ui-btn-inline { display: inline-block; }
 .ui-btn-inner { padding: .6em 25px; display: block; height: 100%; text-overflow: ellipsis; overflow: hidden; white-space: nowrap; position: relative; }