add motd editor and motd display

app/templates/topics/topics.html

@@ -1,4 +1,4 @@
-{% from 'common/macros.html' import timestamp, subheader %}
+{% from 'common/macros.html' import timestamp, subheader, motd %}
 {% from 'common/icons.html' import icn_locked %}
 {%- extends 'base.html' -%}
 {%- block content -%}
@@ -7,10 +7,11 @@
 <fieldset class="plank even no-shadow minimal thread-actions">
   <legend>Moderation actions</legend>
   <a href="{{url_for('mod.new_topic')}}" class="linkbutton">New topic</a>
-  <a href="{{url_for('mod.sort_topics')}}" class="linkbutton">Sort topics</a>
+  <a href="{{url_for('mod.index', _anchor='sort-topics')}}" class="linkbutton">Sort topics</a>
 </fieldset>
 {%- endif -%}
 {%- endcall -%}
+{{ motd(get_motds()) }}
 {%- for topic in topics -%}
 <div class="topic-info plank">
   <div class="title-container">