ui: fix discussion edited display

packages/ui-default/templates/components/comments_discussion.html

@@ -134,7 +134,7 @@
                 <div class="supplementary dczcomments__supplementary">
                   {{ user.render_inline(udoc, avatar=false) }}
                   @ {{ datetimeSpan(rdoc._id)|safe }}
-                  {% if doc.edited %} 
+                  {% if rdoc.edited %} 
                     <div class="history" data-discussion-history data-raw-url="{{ url('discussion_tail_reply_raw', did=doc.parentId, drid=doc._id, drrid=rdoc._id) }}"><a>{{ _('Edited') }}</a></div>
                   {% endif %}
                 </div>