Added invoice_number field to receivings table

Save comments field in receivings as in sales
Add translations for cancel button in receivings
Add cascading deletes for ospos_permissions

database/database.sql

@@ -354,6 +354,7 @@ CREATE TABLE `ospos_receivings` (
   `comment` text NOT NULL,
   `receiving_id` int(10) NOT NULL AUTO_INCREMENT,
   `payment_type` varchar(20) DEFAULT NULL,
+  `invoice_number` varchar(32) DEFAULT NULL,
   PRIMARY KEY (`receiving_id`),
   KEY `supplier_id` (`supplier_id`),
   KEY `employee_id` (`employee_id`)