ExtJS Chart Legend itemclick listener doesn’t work

I have a trouble with triggering ExtJS legend event.

For instance, in this fiddle I want to fire itemclick:

https://fiddle.sencha.com/#view/editor&fiddle/3j0c

But nothing happens.

Ext.create({
   xtype: 'polar',
   renderTo: document.body,
   width: 400,
   height: 400,
   theme: 'green',
   legend: {
    docked: 'bottom',
     listeners: {
        itemclick: function() {
            console.log("Item clicked");
        }
    },
    },
   interactions: ['rotate', 'itemhighlight'],
   store: {
       fields: ['name', 'data1'],
       data: [{
           name: 'metric one',
           data1: 14
       }, {
           name: 'metric two',
           data1: 16
       }, {
           name: 'metric three',
           data1: 14
       }, {
           name: 'metric four',
           data1: 6
       }, {
           name: 'metric five',
           data1: 36
       }]
   },

   series: {
       type: 'pie',
       highlight: true,
       angleField: 'data1',
       label: {
           field: 'name',
           display: 'rotate'
       },
       donut: 30
   }
});