title: amCharts Radar is not responsive
body: <p>Though I have included responsive js &amp; enabled responsive property to true, Radar chart is not responsive. Even on their site, it is not responsive for mobile view.</p>
  
  <p>What should I do?</p>
  
  <pre><code> &lt;div id="chartdiv" style="width: 100%; height: 100%;"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>This is my script : </p>
  
  <pre><code> &lt;script&gt;
    var chart = AmCharts.makeChart("chartdiv1", {
        "type": "radar",
        "dataProvider": [{
          "country": "Czech Republic",
          "litres": 156.9
        }, {
          "country": "Ireland",
          "litres": 131.1
        }],
        "categoryField": "country",
        "startDuration": 2,
        "valueAxes": [{
          "axisAlpha": 0.15,
          "minimum": 0,
          "dashLength": 3,
          "axisTitleOffset": 20,
          "gridCount": 5
        }],
        "graphs": [{
          "valueField": "litres",
          "title": "Litres",
          "bullet": "round",
          "balloonText": "[[value]] litres of beer per year"
        }],
        "legend": {},
        "responsive": {
          "enabled": true
        }
    });
  &lt;/script&gt;
  </code></pre>