Fix: Cancel edit notifcaition settings

Author: kevin-lann

course-matrix/frontend/src/pages/Home/EmailNotificationSettings.tsx

@@ -28,6 +28,10 @@ export const EmailNotificationSettings = ({
   const [updateTimetable] = useUpdateTimetableMutation();
   const [toggled, setToggled] = useState<boolean>(false);
 
+  const handleCancel = () => {
+    setToggled((data as TimetableModel[])[0]?.email_notifications_enabled);
+  }
+
   useEffect(() => {
     if (data) {
       const val = (data as TimetableModel[])[0]?.email_notifications_enabled;
@@ -79,7 +83,7 @@ export const EmailNotificationSettings = ({
         </div>
         <DialogFooter>
           <DialogClose asChild>
-            <Button variant="outline">Cancel</Button>
+            <Button variant="outline" onClick={handleCancel}>Cancel</Button>
           </DialogClose>
           <DialogClose asChild>
             <Button onClick={handleUpdateEmailNotifications}>Save</Button>