Minor css enhancements

* minor changes for <a> tags
* centers link for older news in card

news/templates/news/dashboard-news.html

@@ -13,9 +13,9 @@
             </div>
         </div>
         {% endfor %}
-        <div class="card col-md {{msg.importance|bootstrap_cls}} align-items-center justify-content-center">
-            <a class="w-100 h-100 align-middle text-center" href="{% url 'news:index' %}">
-                <div class="card-body">
+        <div class="card col-md {{msg.importance|bootstrap_cls}}">
+            <a class="w-100 h-100" href="{% url 'news:index' %}">
+                <div class="card-body  d-flex align-items-center justify-content-center h-100">
                     <h5 class="card-title">{% trans 'Older ...' %}</h5>
                 </div>
             </a>