Fix ordering in items and fix qute to accept value more than remaining value.

invoices/models.py

@@ -147,8 +147,8 @@ class Quote(NameSlugModel):
         """مبلغ باقی‌مانده بر اساس پرداخت‌ها"""
         paid = self.get_paid_amount()
         remaining = self.final_amount - paid
-        if remaining < 0:
-            remaining = Decimal('0')
+        # if remaining < 0:
+        #     remaining = Decimal('0')
         return remaining
 
     def get_vat_amount(self) -> Decimal: