*define new listbox for inventory to show variation on resource and item
*add new column for item in PurchasePackingList_view and SalePackingList_view
*quantity is non-editable if item is defined on Delivery Line

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27062 20353a03-c40f-0410-a6d1-a30d3c3de9de