title: Highcharts tooltip overlapped by absolute positioned element
body: <p>For my chart, I would like to position an element absolutely on the chart but under the tooltip in terms of stacking, would this be possible?</p>
  
  <p>Example at: <a href="http://jsfiddle.net/0vdnrm26/1/" rel="nofollow noreferrer">http://jsfiddle.net/0vdnrm26/1/</a>,
  The final tooltip on <code>Asia</code> is being overlapped by the <code>hello world</code> div, ideally the tooltip would be over the <code>hello world</code>.</p>