add hidden account, cart insert/delete

add hidden account support
add delete/payout buttons to carts
add backend product sales with pdf export
add frontend product sales with pdf export
add frontend ticket sales with pdf export

common/models/Transfer.php

@@ -355,6 +355,7 @@ class Transfer extends \common\models\BaseFitnessActiveRecord
     	
     	$transfer->status = $status;
     	$transfer->type = Transfer::TYPE_TICKET;
+    	$transfer->direction = Transfer::DIRECTION_IN;
     	
     	$transfer->id_object  = $ticket->id_ticket;