[ADD] module to update product supplier prices from the invoice view.
[ADD] some bug fixes
[RFR] Description
[RFR] Flake8
[RFR] Avoid extra ident
[FIX] Bugs in previous commit
[IMP] Variable naming consistency
[RFR] Eliminate second loop
[FIX] Supplier info's product refers to template
[RFR] Eliminate double code for creating pricelist.partnerinfo
[RFR] Don't use _id suffix for browse record
[RFR] Reuse retrieved pool
[RFR] Reuse boolean value returned by last call anyway