[FIX] sale: uom conversion for invoiced quantities
[FIX] sale: uom conversion for invoiced quantities

When invoicing products from a SO, you may decide to change the uom
of the invoice (if you invoiced only  a fraction of the product, for
example). In that case, conversion is necessary to ensure that the
"invoiced quantity" field on the SO line is correct.

storm-computers/odoo,laslabs/odoo,dfang/odoo,bplancher/odoo,microcom/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,dfang/odoo,hip-odoo/odoo,dfang/odoo,bplancher/odoo,laslabs/odoo,bplancher/odoo,microcom/odoo,storm-computers/odoo,laslabs/odoo,bplancher/odoo,laslabs/odoo,microcom/odoo,bplancher/odoo,dfang/odoo,microcom/odoo,storm-computers/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,sysadminmatmoz/OCB,hip-odoo/odoo,laslabs/odoo,laslabs/odoo,sysadminmatmoz/OCB,ygol/odoo,storm-computers/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,storm-computers/odoo,ygol/odoo,Elico-Corp/odoo_OCB,microcom/odoo,Elico-Corp/odoo_OCB,ygol/odoo,Elico-Corp/odoo_OCB,dfang/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,storm-computers/odoo,ygol/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,ygol/odoo,bplancher/odoo,sysadminmatmoz/OCB,ygol/odoo,hip-odoo/odoo,ygol/odoo,dfang/odoo,microcom/odoo