title: How to update highstock with navigator disabled?
body: <p>I have a problem with highstock : I update my graph with realtime datas.
  It works perfectly when navigator is enabled.</p>
  
  <p>=> <a href="http://jsfiddle.net/gh/get/jquery/1.7.2/highslide-software/highcharts.com/tree/master/samples/stock/demo/dynamic-update/" rel="nofollow">official example</a> </p>
  
  <p>But when I disable navigator, update is really bugged :</p>
  
  <pre><code>...
  navigator: {
      enabled: false
  },
  ...
  </code></pre>
  
  <p>=> <a href="http://jsfiddle.net/a7AjD/" rel="nofollow">Bug example</a></p>
  
  <p>Someone has an idea why ?</p>