Revert "Removed edit from Discount Report" (#1823)

This reverts commit 60d77e1f61.

application/controllers/Reports.php

@@ -1070,7 +1070,8 @@ class Reports extends Secure_Controller
 				'profit' => to_currency($row['profit']),
 				'payment_type' => $row['payment_type'],
 				'comment' => $row['comment'],
-				
+				'edit' => anchor('sales/edit/'. $row['sale_id'], '<span class="glyphicon glyphicon-edit"></span>',
+					array('class'=>'modal-dlg print_hide', $button_key => $button_label, 'data-btn-submit' => $this->lang->line('common_submit'), 'title' => $this->lang->line('sales_update')))
 			));
 
 			foreach($report_data['details'][$key] as $drow)