[FIX] sale: fix display in form view of sale order line
[FIX] sale: fix display in form view of sale order line

Div had not impact in quotation view, so I decide to remove it.
But it create an offset in the sale order form view.

Previous commit #2d1db7d fix the form view of quotation lines
but break the form view of sale order line.
https://cloud.githubusercontent.com/assets/10741187/13401517/51989574-df04-11e5-89f0-b3e625d05a7c.png

Related to #11081

microcom/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB,storm-computers/odoo,Elico-Corp/odoo_OCB,microcom/odoo,ygol/odoo,bplancher/odoo,hip-odoo/odoo,microcom/odoo,storm-computers/odoo,stephen144/odoo,dfang/odoo,storm-computers/odoo,bplancher/odoo,sysadminmatmoz/OCB,ygol/odoo,storm-computers/odoo,hip-odoo/odoo,ygol/odoo,dfang/odoo,storm-computers/odoo,bplancher/odoo,hip-odoo/odoo,stephen144/odoo,laslabs/odoo,sysadminmatmoz/OCB,ygol/odoo,dfang/odoo,microcom/odoo,storm-computers/odoo,laslabs/odoo,dfang/odoo,dfang/odoo,sysadminmatmoz/OCB,ygol/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,stephen144/odoo,stephen144/odoo,laslabs/odoo,laslabs/odoo,laslabs/odoo,dfang/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,bplancher/odoo,hip-odoo/odoo,stephen144/odoo,microcom/odoo,bplancher/odoo,stephen144/odoo,sysadminmatmoz/OCB,hip-odoo/odoo,microcom/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,ygol/odoo,ygol/odoo,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB