At this point, you can now rerun the Notes application and try this out.
Launch the user authentication server and the Notes application as before. Then, in the browser, open multiple windows on the Notes application. This time, have one viewing the home page, and two viewing a note. In one of those windows, edit the note to make a change, and see the text change on both the home page and the page viewing the note.
Then delete the note, and watch it disappear from the home page, and the browser window that had viewed the note is now on the home page.