test: fix test

Author: sjbur

packages/devextreme/js/__internal/scheduler/m_scheduler.ts

@@ -922,6 +922,7 @@ class Scheduler extends SchedulerOptionsBaseWidget {
     const isReadOnly = Object.values({
       ...this._editing,
       form: undefined,
+      popup: undefined,
     }).every((value) => !value);
 
     (this.$element() as any).toggleClass(WIDGET_READONLY_CLASS, isReadOnly);

packages/devextreme/testing/tests/DevExpress.ui.widgets.scheduler/common.options.tests.js

@@ -588,7 +588,8 @@ QUnit.module('Options', () => {
             legacyForm: false,
             form: {
                 iconsShowMode: 'main'
-            }
+            },
+            popup: {}
         };
 
         if(devices.real().platform !== 'generic') {