[FIX] account: Currency rate in account.invoice.report
[FIX] account: Currency rate in account.invoice.report

It's more usefull to display the average than the sum for the currency
rate in account.invoice.report

opw:690899

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