[FIX] account: payment reference exact match without spaces

The spaces should not be important in a structured reference.
Also, we should not have to include the second batch as that batch
(previously the first) was intended to match the payment reference.
By including it, we may have too much false positives proposed in the
widget and even worse: auto reconciled.

closes odoo/odoo#39334

Signed-off-by: Quentin De Paoli (qdp) <qdp@openerp.com>