[IMP] point_of_sale: allow users to modify pricelist on customers

It's not a common use case for existing customers, but it's probably
useful to have when creating new customers.

addons/point_of_sale/static/src/js/models.js

@@ -287,7 +287,7 @@ exports.PosModel = Backbone.Model.extend({
         loaded: function(self, locations){ self.shop = locations[0]; },
     },{
         model:  'product.pricelist',
-        fields: ['name'],
+        fields: ['name', 'display_name'],
         domain: function(self) { return [['id', 'in', self.config.available_pricelist_ids]]; },
         loaded: function(self, pricelists){
             _.map(pricelists, function (pricelist) { pricelist.items = []; });

addons/point_of_sale/static/src/js/screens.js

@@ -1239,6 +1239,12 @@ var ClientListScreenWidget = ScreenWidget.extend({
         fields.id           = partner.id || false;
         fields.country_id   = fields.country_id || false;
 
+        if (fields.property_product_pricelist) {
+            fields.property_product_pricelist = parseInt(fields.property_product_pricelist, 10);
+        } else {
+            fields.property_product_pricelist = false;
+        }
+
         rpc.query({
                 model: 'res.partner',
                 method: 'create_from_ui',

addons/point_of_sale/static/src/xml/pos.xml

@@ -384,6 +384,17 @@
                         <span class='label'>Tax ID</span>
                         <input class='detail vat'           name='vat'     t-att-value='partner.vat || ""'></input>
                     </div>
+                    <div t-attf-class='client-detail #{widget.pos.pricelists.length &lt;= 1 ? "oe_hidden" : ""}'>
+                        <span class='label'>Pricelist</span>
+                        <select class='detail needsclick' name='property_product_pricelist'>
+                            <t t-foreach='widget.pos.pricelists' t-as='pricelist'>
+                                <option t-att-value='pricelist.id'
+                                        t-att-selected="partner.property_product_pricelist ? (pricelist.id === partner.property_product_pricelist[0] ? true : undefined) : undefined"> 
+                                    <t t-esc='pricelist.display_name'/>
+                                </option>
+                            </t>
+                        </select>
+                    </div>
                 </div>
             </div>
         </section>
@@ -446,7 +457,7 @@
                             <span class='detail vat empty'>N/A</span>
                         </t>
                     </div>
-                    <div class='client-detail'>
+                    <div t-attf-class='client-detail #{widget.pos.pricelists.length &lt;= 1 ? "oe_hidden" : ""}'>
                         <span class='label'>Pricelist</span>
                         <t t-if='partner.property_product_pricelist'>
                             <span class='detail property_product_pricelist'><t t-esc='partner.property_product_pricelist[1]'/></span>