[FIX] point_of_sale: default partner price list

Before, when we tried to open the Partner detail screen, we had an issue when the price list weren't loaded.

But since this commit: 40f0482b680a7872d338fa8fd10eec4663637b46
The price list are not mandatory anymore, we can get rid of the check that consisted of verifying the price list were set on the partners.

closes odoo/odoo#111665

Signed-off-by: Trinh Jacky (trj) <trj@odoo.com>

addons/point_of_sale/models/product.py

@@ -66,7 +66,7 @@ class ProductProduct(models.Model):
             pricelists = config.available_pricelist_ids
         else:
             pricelists = config.pricelist_id
-        price_per_pricelist_id = pricelists._price_get(self, quantity)
+        price_per_pricelist_id = pricelists._price_get(self, quantity) if pricelists else False
         pricelist_list = [{'name': pl.name, 'price': price_per_pricelist_id[pl.id]} for pl in pricelists]
 
         # Warehouses

addons/point_of_sale/static/src/js/Screens/PartnerListScreen/PartnerDetailsEdit.js

@@ -17,10 +17,8 @@ export class PartnerDetailsEdit extends PosComponent {
         this.changes = {
             country_id: partner.country_id && partner.country_id[0],
             state_id: partner.state_id && partner.state_id[0],
+            property_product_pricelist: this.setDefaultPricelist(partner)
         };
-        if (!partner.property_product_pricelist) {
-            this.changes["property_product_pricelist"] = this.env.pos.default_pricelist.id;
-        }
 
         onMounted(() => {
             this.env.bus.on("save-partner", this, this.saveChanges);
@@ -30,6 +28,16 @@ export class PartnerDetailsEdit extends PosComponent {
             this.env.bus.off("save-partner", this);
         });
     }
+    setDefaultPricelist(partner) {
+        if (partner.property_product_pricelist) {
+            return partner.property_product_pricelist[0]
+        }
+        else if (this.env.pos.default_pricelist) {
+            return this.env.pos.default_pricelist.id;
+        }
+        return false;
+    }
+
     get partnerImageUrl() {
         // We prioritize image_1920 in the `changes` field because we want
         // to show the uploaded image without fetching new data from the server.