title: cascading context menu for highcharts
body: <p>Is is possible to have a cascading context menu for highcharts ? I know there is options such as "save as jpg etc" but I want to build a little more complex one e.g. </p>
  
  <pre><code>"option 1"-&gt;"suboption 1"
              "suboption 2"
  "option 2"-&gt;"suboption 1"
              "suboption 2"
  </code></pre>
  
  <p>So when the user hovers over option 1 then a little submenu pops up. Is it possible ?</p>