Use the new MessageList for storing messages

(imported from commit 38a04d2ff504aa49189997b972318af7c944d528)

zephyr/static/js/hashchange.js

@@ -78,7 +78,7 @@ function hashchanged() {
 exports.initialize = function () {
     window.onhashchange = hashchanged;
     if (hashchanged()) {
-        load_more_messages();
+        load_more_messages(current_msg_list);
     }
 };