Scheduler: stabilize tests (#35000)

Author: sjbur

e2e/testcafe-devextreme/tests/scheduler/common/dragAndDrop/basic.ts

@@ -77,7 +77,7 @@ test('Drag-n-drop when browser has vertical scroll', async (t) => {
   height: 1800,
 }));
 
-test('Drag recurrent appointment occurrence from collector (T832887)', async (t) => {
+test.meta({ unstable: true })('Drag recurrent appointment occurrence from collector (T832887)', async (t) => {
   const scheduler = new Scheduler('#container');
   const appointment = scheduler.getAppointment('Recurrence two');
   const collector = scheduler.collectors.find('2');

e2e/testcafe-devextreme/tests/scheduler/common/recurrences/basic.ts

@@ -8,7 +8,7 @@ import { testScreenshot } from '../../../../helpers/themeUtils';
 fixture`Rendering of the recurrence appointments in  Scheduler `
   .page(url(__dirname, '../../../container.html'));
 
-test('Drag-n-drop recurrence appointment between dateTable and allDay panel', async (t) => {
+test.meta({ unstable: true })('Drag-n-drop recurrence appointment between dateTable and allDay panel', async (t) => {
   const { takeScreenshot, compareResults } = createScreenshotsComparer(t);
   const scheduler = new Scheduler('#container');
   const draggableAppointment = scheduler.getAppointment('Simple recurrence appointment');