analytics: Fix placement of envelope icons.

We neglected to update this bit of logic when migrating to have the
totals at the top of the page.

templates/analytics/realm_summary_table.html

@@ -61,7 +61,7 @@
             </td>
 
             <td>
-                {% if not loop.last %}
+                {% if not loop.first %}
                 <a class="envelope-link" data-admin-emails="{{ row.realm_owner_emails }}">
                     <i class="fa fa-envelope"></i>
                 </a>