title: How to set CommandBar under SplitView?
body: <p>I'm developing an application for Windows 10 Platform.
  While developing this application, I ran into an issue where <code>CommandBar</code> is above <code>SplitView</code>. </p>
  
  <p>How do I set <code>CommandBar</code> under <code>SplitView</code> under controls on the page?</p>