Is there way to set the label of an Bar Chart to 50% of the charts width? I've tried this but it does not work:

```
 xAxis: {
        categories: [],
        labels: {
          formatter: function() {
            var text = this.value;
            return '<div class="js-ellipse" style="width:100%; overflow:hidden; text-overflow: ellipsis" title="' + text + '">' + text + '</div>';
          },
          style: {
            width: '50%'
          },
          useHTML: true
        }
      },

```

So goal is to have labels on the left side of the bar chart that are 50% of the width of the whole chart container.