Purchase order status incorrect after create invoice from GRN

[steveblamey]

When an invoice is created from multiple GRNs for the same line that equal the line order quantity, the order line and order status remains as 'Received' but should be 'Invoiced'.

See:

uzerp/modules/public_pages/erp/order/purchase_order/controllers/PordersController.php

Line 1813 in 16f6c7b

public function saveinvoice()