- made it possible to edit Production Order Lines from Production Order view properties: int_index, quantity, quantity_unit, reference and stop_date, so Production Order is usable almost exactly as other orders in the system (based on Sale Order layout)

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21878 20353a03-c40f-0410-a6d1-a30d3c3de9de