Update unit price when modifying posted invoice or done move

The stock_moves or invoice_lines should be editable after the invoice is posted or the move is done (partially already the case). This permits to correct mistakes. When they are changed, we must re-compute the unit price and save it.

assigned to @ced

added accounting type::feature + 1 deleted label

added 1 deleted label and removed 1 deleted label

review292991002 updated at https://codereview.tryton.org/292991002/#ps347141002

review292991002 updated at https://codereview.tryton.org/292991002/#ps327051003

New changeset e49acf5baa3d by Cédric Krier in branch 'default':
Update unit price after invoice posted and move done
https://hg.tryton.org/modules/account_invoice/rev/e49acf5baa3d

added 1 deleted label and removed 1 deleted label

closed

New changeset affac0b0273e by Cédric Krier in branch 'default':
Update unit price after invoice posted and move done
https://hg.tryton.org/modules/account_invoice_stock/rev/affac0b0273e

New changeset 86bbfaea7a8c by Cédric Krier in branch 'default':
Update unit price after invoice posted and move done
https://hg.tryton.org/modules/stock/rev/86bbfaea7a8c

New changeset 18faa2f4113e by Cédric Krier in branch 'default':
Update unit price after invoice posted and move done
https://hg.tryton.org/tryton-env/rev/18faa2f4113e

New changeset b28d22ff345e by Cédric Krier in branch 'default':
Recompute cost price of drop shipment
https://hg.tryton.org/modules/sale_supply_drop_shipment/rev/b28d22ff345e

New changeset 7eee1485ba07 by Cédric Krier in branch 'default':
Recompute cost price of drop shipment
https://hg.tryton.org/tryton-env/rev/7eee1485ba07

mentioned in issue #10062 (closed)

mentioned in issue #11295 (closed)