title: Create Hints flyout when clicking on help icon
body: <p>I want to create the WPF effect of a Hints popup when hovering over or clicking a help icon at the end of a row.  Any ideas?  I tried something like this, except when I click the Flyout doesn't activate.</p>
  
  <pre><code>&lt;TextBlock Text="?"&gt;
      &lt;TextBlock.ContextFlyout&gt;
          &lt;Flyout&gt;
              &lt;RichTextBlock&gt;
                  &lt;Paragraph&gt;
                    This is the help &lt;LineBreak/&gt;
                    for this row&lt;LineBreak/&gt;
                  &lt;/Paragraph&gt;
              &lt;/RichTextBlock&gt;
          &lt;/Flyout&gt;
     &lt;/TextBlock.ContextFlyout&gt;
  &lt;/TextBlock&gt;
  </code></pre>