CSS: Use action-link instead of user-add in the user/list view script

refs #5543

application/views/scripts/user/list.phtml

@@ -32,7 +32,7 @@ $reducible = $this->hasPermission('config/authentication/users/remove') && $back
     <?= $this->qlink($this->translate('Add a new user'), 'user/add', array('backend' => $backend->getName()), array(
         'icon'                => 'plus',
         'data-base-target'    => '_next',
-        'class'               => 'user-add'
+        'class'               => 'action-link'
     )) ?>
 <?php endif ?>
     <table data-base-target="_next" class="action">