title: Event on middle click pie chart slice?
body: <p>I'm trying to get a middle click event for the Highcharts pie chart api, but I can't find anything in their <a href="https://api.highcharts.com/highcharts/chart" rel="nofollow noreferrer">api documentation</a> for it.</p>
  
  <p>I created this test to demonstrate that there's no <code>console.log</code> when you middle click a slice, but there is a <code>console.log</code> when you <kbd>ctrl</kbd>+<kbd>click</kbd>, or regular <kbd>click</kbd> it.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>$(function () {
      $('#container').highcharts({
          chart: {
              type: 'pie'
          },
          
          plotOptions: {
              series: {
                  cursor: 'pointer',
                  point: {
                      events: {
                          click: function() {
                              console.log('clicked on y: ' + this.y);
                          },
                      }
                  }
              }
          },
          
          series: [{
              data: [{
                  y: 29.9
              }, {
                  y: 71.5
              }, {
                  y: 106.4
              }]        
          }]
      });
  });</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
  &lt;script src="http://code.highcharts.com/highcharts.js"&gt;&lt;/script&gt;
  
  &lt;div id="container" style="height: 400px"&gt;&lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Is there any way to fire an event when I middle click a pie chart slice?</p>