title: Better ways to display html content with apps scripts?
body: <p>From what I understood, there are 2 ways to display html content with apps script :
  Sidebar and a modal dialog box.</p>
  <p>Problems:</p>
  <ul>
  <li>The modal box adds a couple extra clicks to display the content.</li>
  <li>The sidebar takes up too much space (too wide, too tall)</li>
  </ul>
  <p>I'd like to have a simple floating square, always displayed, like a position:fixed div in the top-right corner of the sheet. Is it possible with apps scripts?</p>