making sequence titles available to non-sighted users

common/lib/xmodule/xmodule/css/sequence/display.scss

@@ -166,7 +166,6 @@ nav.sequence-nav {
         p {
           background: #333;
           color: #fff;
-          display: none;
           font-family: $sans-serif;
           line-height: lh();
           left: 0px;

lms/templates/seq_module.html

@@ -16,7 +16,7 @@
            data-id="${item['id']}"
            data-element="${idx+1}"
            href="javascript:void(0);">
-            <p>${item['title']}</p>
+            <p class="sr">${item['title']}, ${item['type']}</p>
           </a>
         </li>
         % endfor