fine tuning headers

rowers/templates/flexthumbnails.html

@@ -1,6 +1,8 @@
-    {% for chart in charts %}
+{% if charts %}
+<h2>Flex Charts</h2>
+{% for chart in charts %}
     <div class="grid_3 alpha">
-      <h4>{{ forloop.counter }}</h4>
+      <big>{{ forloop.counter }}</big>
       <div class="grid_3 tooltip">
         <a href="/rowers/workout/{{ workout.id }}/flexchart?favoritechart={{ forloop.counter |add:"-1" }}">
           {{ chart.div | safe }}
@@ -9,3 +11,4 @@
       </div>
     </div>
     {% endfor %}
+{% endif %}