[FIX] account: reconcile through widget associate payment/invoice

Create an invoice, validate it

Create a payment from athe account.payment model (not the register payment wizard)

click on the smart button payment matching, and match the invoice with the payment
Reconcile

Before this commit, the invoice was not part of the invoice_ids field of the payment,
So, when printing the payment receipt or check, there was nothing on there

After this commit, we associate the invoice with the payment, and the receipt prints
what is expected

OPW 1871575

closes #26245

addons/account/models/account_move.py

@@ -1542,6 +1542,21 @@ class AccountMoveLine(models.Model):
         action['domain'] = [('id', 'in', ids)]
         return action
 
+    @api.multi
+    def _payment_invoice_match(self):
+        '''
+        If a partial reconciliation involves payments and invoices
+        mark the invoices as paid by the payments
+        Specifically made for len(self) == 2
+        '''
+        if not self:
+            return
+        invoice_ids = self.mapped('invoice_id')
+        payment_ids = self.mapped('payment_id')
+
+        if payment_ids and invoice_ids:
+            payment_ids.write({'invoice_ids': [(4, inv.id, False) for inv in invoice_ids]})
+
 
 class AccountPartialReconcile(models.Model):
     _name = "account.partial.reconcile"
@@ -1830,6 +1845,7 @@ class AccountPartialReconcile(models.Model):
             aml.append(vals['credit_move_id'])
         # Get value of matched percentage from both move before reconciliating
         lines = self.env['account.move.line'].browse(aml)
+        lines._payment_invoice_match()
         if lines[0].account_id.internal_type in ('receivable', 'payable'):
             percentage_before_rec = lines._get_matched_percentage()
         # Reconcile