Fixes dashboard for empty arrays

www/pocwww/pocwww/templates/dashboard.jinja2

@@ -6,6 +6,7 @@
         <div class="row">
             <div class="col-xs-6">
                 <h2>Latest Tag Values</h2>
+                {% if tag_values|length > 0 %}
                 <div class="table-responsive">
                     <table class="table table-striped">
                         <thead>
@@ -21,7 +22,7 @@
                             </tr>
                         </thead>
                         <tbody>
-                            {% if tag_values.length > 0}
+
                             {% for t in tag_values %}
                                 <tr>
                                     <td><a href="/values/tag/{{t._id}}">{{t._id}}</a></td>
@@ -41,18 +42,24 @@
                                     <td>{{t.total | round(3)}}</td> -->
                                 </tr>
                             {% endfor %}
-                            {% endif %}
+
                         </tbody>
                     </table>
                 </div>
+                {% else %}
+                <h3>No tag values yet...</h3>
+                {% endif %}
+
 
             </div>
             <div class="col-xs-6">
                 <h2>Latest Card</h2>
-                {% if latest_card %}
+                {% if latest_card|length > 0 %}
                 <h3>{{latest_card.timestamp | datetime('long')}}</h1>
                 <div class="surfacecard card"></div>
                 <div class="downholecard card"></div>
+                {% else %}
+                <h3>No card data yet...</h3>
                 {% endif %}
             </div>
         </div>