Print the number of users on the channels in Insights

core/templates/ui/insights/channels.html

@@ -1,3 +1,5 @@
+{% load index %}
+
 <div id="channels">
   <div class="content" style="max-height: 30em; overflow: auto;">
     <table class="table is-fullwidth is-hoverable">
@@ -13,6 +15,11 @@
               class="button is-small">
               {{ chan }}
             </span>
+            {% if chan in num_users %}
+              <span class="tag">
+                {{ num_users|index:chan }}
+              </span>
+            {% endif %}
           </td>
         </tr>
       {% endfor %}