Fix some things in admin backend

app/templates/admin/admin.html.j2

@@ -6,6 +6,26 @@
     <div class="col s12">
       <h1 id="title">{{ title }}</h1>
     </div>
+
+    <div class="col s12 l4">
+      <div class="card hoverable">
+        <a href="{{ url_for('.users') }}" style="position: absolute; width: 100%; height: 100%;"></a>
+        <div class="card-content">
+          <span class="card-title"><i class="material-icons left">group</i>Users</span>
+          <p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, </p>
+        </div>
+      </div>
+    </div>
+
+    <div class="col s12 l4">
+      <div class="card hoverable">
+        <a href="{{ url_for('.corpora') }}" style="position: absolute; width: 100%; height: 100%;"></a>
+        <div class="card-content">
+          <span class="card-title"><i class="nopaque-icons left">I</i>Corpora</span>
+          <p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, </p>
+        </div>
+      </div>
+    </div>
   </div>
 </div>
 {% endblock page_content %}

app/templates/admin/user.html.j2

@@ -17,7 +17,7 @@
         <span class="chip white-text" id="user-confirmed-chip" style="background-color: #f44336;">unconfirmed</span>
         {% endif %}
       </p>
-      <p>{{ user.about_me }}</p>
+      <p>{{ user.about_me if user.about_me }}</p>
     </div>
 
     <div class="col s12 hide-on-med-and-down">&nbsp;</div>