[FIX] point_of_sale: wrong behavior Price Control (odoo#26232)

Before the fix price control only worked like should on initialisation of a pos section. On switching cashier during a setting manager would lose price change rights and normal users would gain them.

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

@@ -394,7 +394,9 @@ var NumpadWidget = PosBaseWidget.extend({
         this.$el.find('.mode-button').click(_.bind(this.clickChangeMode, this));
     },
     applyAccessRights: function() {
-        var has_price_control_rights = !this.pos.config.restrict_price_control || this.pos.get_cashier().role == 'manager';
+        var has_price_control_rights = !this.pos.config.restrict_price_control
+            || (this.pos.changed.cashier && this.pos.changed.cashier.role == 'manager')
+            || (!this.pos.changed.cashier && this.pos.get_cashier().role == 'manager');
         this.$el.find('.mode-button[data-mode="price"]')
             .toggleClass('disabled-mode', !has_price_control_rights)
             .prop('disabled', !has_price_control_rights);