[FIX] account: portal user can show not finished invoice

- Create an Order, send to customer
- Create an invoice from this sale
--> Issue the customer can show the invoice in draft mode
This prevent customer to print a draft invoice with wrong value.

Only show send invoice.

closes odoo/odoo#114733

X-original-commit: 687f4792
Signed-off-by: Olivier Colson (oco) <oco@odoo.com>