test center registration - added final styling and label focus JS

lms/templates/test_center_register.html

@@ -31,6 +31,12 @@
       }
     });
 
+    $("form :input").focus(function() {
+      $("label[for='" + this.id + "']").addClass("is-focused");
+    }).blur(function() {
+      $("label").removeClass("is-focused");
+    });
+
   })(this)
   </script>
 </%block>