Scheduler - Appointment Form - Fix popup back button aria-label (#32272)

Author: Tucchhaa

packages/devextreme/js/__internal/scheduler/__tests__/__mock__/model/popup.ts

@@ -301,7 +301,7 @@ export class PopupModel {
   };
 
   getBackButton = (): HTMLButtonElement => {
-    const backButton = this.element.querySelector('.dx-toolbar-button  .dx-button[aria-label="arrowleft"]') as HTMLButtonElement;
+    const backButton = this.element.querySelector('.dx-toolbar-button  .dx-button[aria-label="Back"]') as HTMLButtonElement;
     if (!backButton) {
       throw new Error('Back button not found');
     }

packages/devextreme/js/__internal/scheduler/appointment_popup/m_popup.ts

@@ -458,6 +458,9 @@ export class AppointmentPopup {
         options: {
           icon: 'arrowleft',
           stylingMode: 'text',
+          elementAttr: {
+            'aria-label': messageLocalization.format('Back'),
+          },
           onClick: (): void => {
             this.form.saveRecurrenceValue();
             this.form.showMainGroup();

packages/testcafe-models/scheduler/appointment/popup.ts

@@ -25,7 +25,7 @@ export const SELECTORS = {
   repeatEditor: `.dx-scheduler-form-repeat-editor .dx-selectbox.dx-widget`,
   descriptionEditor: `.dx-scheduler-form-description-editor .dx-textarea.dx-widget`,
   recurrenceGroup: '.dx-scheduler-form-recurrence-group',
-  backButton: `.dx-button.dx-widget[aria-label="arrowleft"]`,
+  backButton: `.dx-button.dx-widget[aria-label="Back"]`,
   recurrenceStartDateInput: '.dx-scheduler-form-recurrence-start-date-editor input[type="text"]',
   recurrenceFrequencyEditor: '.dx-scheduler-form-recurrence-frequency-editor .dx-selectbox.dx-widget',
   repeatEditorButton: '.dx-scheduler-form-repeat-editor .dx-button-has-icon',