public ActionResult Configure(PayPalExpressConfigurationModel model, FormCollection form)
        {
            if (!ModelState.IsValid)
                return Configure();

            ModelState.Clear();

            var storeDependingSettingHelper = new StoreDependingSettingHelper(ViewData);
            int storeScope = this.GetActiveStoreScopeConfiguration(_storeService, _services.WorkContext);
            var settings = _services.Settings.LoadSetting<PayPalExpressPaymentSettings>(storeScope);

            model.Copy(settings, false);

            storeDependingSettingHelper.UpdateSettings(settings, form, storeScope, _services.Settings);

            // multistore context not possible, see IPN handling
            _services.Settings.SaveSetting(settings, x => x.UseSandbox, 0, false);

            _services.Settings.ClearCache();
            NotifySuccess(_services.Localization.GetResource("Plugins.Payments.PayPal.ConfigSaveNote"));

            return Configure();
        }
        public ActionResult Configure()
        {
            var model = new PayPalExpressConfigurationModel();
            int storeScope = this.GetActiveStoreScopeConfiguration(_storeService, _services.WorkContext);
            var settings = _services.Settings.LoadSetting<PayPalExpressPaymentSettings>(storeScope);

            model.Copy(settings, true);

            model.TransactModeValues = TransactModeValues(settings.TransactMode);

            var storeDependingSettingHelper = new StoreDependingSettingHelper(ViewData);
            storeDependingSettingHelper.GetOverrideKeys(settings, model, storeScope, _services.Settings);

            return View(model);
        }