Fix missing backtopage param

htdocs/adherents/agenda.php

@@ -141,7 +141,7 @@ if ($object->id > 0)
 
     if (! empty($conf->agenda->enabled))
     {
-        print '<div class="inline-block divButAction"><a class="butAction" href="'.DOL_URL_ROOT.'/comm/action/card.php?action=create">'.$langs->trans("AddAction").'</a></div>';
+        print '<div class="inline-block divButAction"><a class="butAction" href="'.DOL_URL_ROOT.'/comm/action/card.php?action=create&backtopage=1">'.$langs->trans("AddAction").'</a></div>';
     }
 
     print '</div>';