Transfers were slowed because of the continuous
computation of pickings remaining quantities.
This revision delay the computation at the end of the transfer,
so the computation is performed only once, and it
therefore leads to a huge performance improvment.
opw-634416
Revert c06a96 "[FIX] stock: force recomputing transfer information on picking"
and unlink packoperations only when move lines are changed (fix opw 620636).
c06a96 introduced a regression as it prevents to plan moves (e.g. assigning lots
through the barcode interface) before the reception.
When clicking on the Transfer button on a picking the packoperations should
always be recomputed.
If the pack operations are only computed the first time, the picking could be
modified (e.g. notice wrong quantity) and still display previous operations when
reloard the transfer button. opw 620636
[IMP] Provide better purchase order picking type
[IMP] Possibly a better product uos handling in the sale order line
[FIX] Recreate of delivery order when sales order in shipping exception
[FIX] Delivery method should be passed to delivery order