Do not reset to quotation Shopify order already processed

After a refund the authorized payment amount may be lower than the amount to
pay but the sale should still stay in processing or done state.

Closes #14816
(grafted from 9df991a256f872f8d9623b675732b1480534e553)

--HG--
branch : 8.0

modules/web_shop_shopify/web.py

@@ -880,7 +880,8 @@ class Shop(metaclass=PoolMeta):
         for sale in to_update:
             if sale.party == sale.web_shop.guest_party:
                 continue
-            if sale.payment_amount_authorized >= sale.amount_to_pay:
+            if (sale.payment_amount_authorized >= sale.amount_to_pay
+                    or sale.state in {'processing', 'done'}):
                 to_process.append(sale)
             else:
                 to_quote.append(sale)