Fix customer return confirm, auto credit note VAT and quotation link

Store the put-away location on return lines (new td_return_item columns, needs setup.php), split auto credit notes into net and VAT with the parent's department, drop the write to a td_quotation column that does not exist, and have the demo seed confirm its customer return.

setup.php

@@ -872,12 +872,24 @@ CREATE TABLE IF NOT EXISTS `td_return_item` (
   `warehouse_id`          int(11)      NOT NULL DEFAULT 0,
   `stock_out_id`          int(11)      NOT NULL DEFAULT 0,
   `stock_out_warehouse_id` int(11)     NOT NULL DEFAULT 0,
+  `zone`                  varchar(255) NOT NULL DEFAULT '',
+  `aisle`                 varchar(255) NOT NULL DEFAULT '',
+  `bin`                   varchar(255) NOT NULL DEFAULT '',
   PRIMARY KEY (`id`),
   UNIQUE KEY `uq_return_item` (`return_id`,`item_id`),
   KEY `idx_return` (`company_id`,`return_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 ", 'td_return_item');
 
+// Put-away location of each returned line. The Customer Return form has always
+// asked for it and ReturnManager::confirmReturn() has always read it, but the
+// table had nowhere to keep it: the choice was dropped on save and every
+// confirmation then failed in WarehouseManager::occupyBin() with
+// "Bin -- does not exist". Same widths as td_stock's location columns.
+run($pdo, "ALTER TABLE `td_return_item` ADD COLUMN `zone`  varchar(255) NOT NULL DEFAULT '' AFTER `stock_out_warehouse_id`", 'td_return_item.zone');
+run($pdo, "ALTER TABLE `td_return_item` ADD COLUMN `aisle` varchar(255) NOT NULL DEFAULT '' AFTER `zone`", 'td_return_item.aisle');
+run($pdo, "ALTER TABLE `td_return_item` ADD COLUMN `bin`   varchar(255) NOT NULL DEFAULT '' AFTER `aisle`", 'td_return_item.bin');
+
 run($pdo, "
 CREATE TABLE IF NOT EXISTS `td_purchase_request` (
   `id`             int(11) unsigned NOT NULL AUTO_INCREMENT,