[FIX] sale: fix downpayment percentage computation (tax included)

Create a standard tax that is included in the product price.
Add that tax to a product and the down payment product.
Create a sales order (i.e. 1 line, 115$ total, 15% tax incl).
Create a percentage down payment invoice, i.e. 50%.

The downpayment amount will be 50% of the untaxed amount,
i.e. 100$ @ 50% = 50$ with tax already included, so actually
lower than 50%

opw-2426294

closes odoo/odoo#65275

X-original-commit: 7ee8f4213d61a1e910db0da98f919ea7f88c0d34
Signed-off-by: agr-odoo <agr-odoo@users.noreply.github.com>

0 files changed, 0 insertions, 0 deletions