[FIX] website_sale: _get_pl_partner_order

With 60300fc, people can use promo code on website.
But the condition leads to a side effect, if a partner has a pricelist set for
him, he will never be able to see the dropdown list of pricelist since he will
enter the else condition with show_visible set to true.

Now, user is able to see selectable pricelists.

opw-1869371

addons/website_sale/models/sale_order.py

@@ -239,8 +239,8 @@ class Website(models.Model):
 
         if not pricelists:  # no pricelist for this country, or no GeoIP
             pricelists |= all_pl.filtered(lambda pl: not show_visible or pl.selectable or pl.id in (current_pl, order_pl))
-        else:
-            pricelists |= all_pl.filtered(lambda pl: not show_visible and pl.sudo().code)
+        if not show_visible and not country_code:
+            pricelists |= all_pl.filtered(lambda pl: pl.sudo().code)
 
         # This method is cached, must not return records! See also #8795
         return pricelists.ids