[FIX] account: payment reconciliation line order

Create 3 invoices for customer (A: $100, B: $300, C: $200)
Have a customer payment of $500
Reconcile the payment, in the widget add the line in the order:
- Payment line
- Invoice A
- Invoice B
- Invoice C (partial payment)
Reconcile
Check invoices

Issue:
C will be fully paid, the partial payment will be applied to B
After 5b2c1d243c0dd5b049ceae280dd270fc8a59f955
We order the lines by amount currency but the user provided order is
lost. Moving the original fix to point of sale

opw-3240586

closes odoo/odoo#120779

X-original-commit: 89f9028901a8b43aab605c12e3c7bcc2a7dd8d44
Related: odoo/enterprise#40805
Signed-off-by: William André (wan) <wan@odoo.com>
Signed-off-by: Grazioso Andrea (agr) <agr@odoo.com>

addons/account/models/account_move_line.py

@@ -1959,12 +1959,18 @@ class AccountMoveLine(models.Model):
         """
 
         def process_amls(amls):
-            sorted_amls = amls.sorted(key=lambda aml: (
-                aml.date_maturity or aml.date,
-                aml.currency_id,
-                aml.amount_currency,
-                aml.balance,
-            ))
+            if self._context.get('reduced_line_sorting'):
+                sorted_amls = amls.sorted(key=lambda aml: (
+                    aml.date_maturity or aml.date,
+                    aml.currency_id,
+                ))
+            else:
+                sorted_amls = amls.sorted(key=lambda aml: (
+                    aml.date_maturity or aml.date,
+                    aml.currency_id,
+                    aml.amount_currency,
+                    aml.balance,
+                ))
             currencies = sorted_amls.currency_id
 
             results = {