Use lastupdated styling for blog post info

i2p2www/pages/blog/post.html

@@ -2,7 +2,7 @@
 {%- from "global/macros" import render_categories with context -%}
 {% block title %}{{ title }} - {{ _('Blog') }}{% endblock %}
 {% block content %}
-<ul id="post-info">
+<ul id="post-info" class="lastupdated">
   <li class="date">{{ meta.date }}</li>
   <li class="author">{{ meta.author }}</li>
   <li class="category">{{ render_categories(meta.category)|safe }}</li>

i2p2www/static/styles/duck/default.css

@@ -226,6 +226,11 @@ div#content .inner td {
     overflow: auto;
 }
 
+#post-info {
+    list-style: none;
+    margin: 0 !important;
+}
+
 #global-footer {
     width:auto;
     border-top:3px