some minor template improvements

app/templates/threads/new_thread.html

@@ -6,7 +6,7 @@
 <form class="plank primary-bg full-width" method="POST">
   <label for="topic">Topic</label>
   <select name="topic_id" id="topic" autocomplete="off">
-    {%- for topic in topics -%}
+    {%- for topic in topics | sort(attribute='sort_order') -%}
     <option value="{{topic.id}}" {{'selected' if selected_topic == topic.id else ''}} {{'disabled' if not get_active_user().can_post_to_thread_or_topic(topic) else ''}}>{{topic.name}}{{ ' (locked)' if topic.locked() else ''}}</option>
     {%- endfor -%}
   </select>