On Sale Items for Tracking Tab v1.0

An enhanced Catalog Tracking tab that includes "On Sale" items. All credit goes to joenmass for the initial idea.

#
#----------[ OPEN ]----------
#
admin/tabs/AdminTracking.php

#
#----------[ FIND ]----------
#
  $this->getObjects('products_disabled');
  $this->displayProducts();

#
#----------[ AFTER, ADD ]----------
#
  $this->getObjects('products_onsale');
  $this->displayProducts();

#
#----------[ FIND ]----------
#
    $this->_list['message'] = $this->l('List of out of stock products with attributes:');
    break ;     

#
#----------[ AFTER, ADD ]----------
#
   case 'products_onsale':
    $sql = '
     SELECT *
     FROM `'._DB_PREFIX_.'product`
     WHERE `on_sale` = 1
     ORDER BY `reference`
    ';
    $this->_list['message'] = $this->l('List of on sale products:');
    break ;