add most active org link
add most active org link

--- a/ckanext/dga_stats/templates/ckanext/stats/index.html
+++ b/ckanext/dga_stats/templates/ckanext/stats/index.html
@@ -304,6 +304,7 @@
         <li class="nav-item"><a href="#stats-most-edited" data-toggle="tab">{{ _('Most Edited Datasets') }}</a></li>
         <li class="nav-item"><a href="#stats-by-org" data-toggle="tab">{{ _('Datasets by Organization') }}</a></li> 
         <li class="nav-item"><a href="#stats-res-by-org" data-toggle="tab">{{ _('Resources by Organization') }}</a></li> 
+        <li class="nav-item"><a href="#stats-activity-org" data-toggle="tab">{{ _('Most Active Organisations') }}</a></li>
         <li class="nav-item active"><a href="#stats-summary" data-toggle="tab">{{ _('Summary') }}</a></li> 
       </ul>
     </nav>