Highcharts-ng rangeSelector不会突出显示所选按钮

Question

以下配置正确选择了范围，但按钮没有突出显示：

rangeSelector: {selected: 3}

相同的配置在没有角度的情况下工作正常。是否有某些特定于高级图表的东西我不知道？这是jsfiddle。

rangeSelector: {
selected: 3,
enabled: true,
buttons: [{ type: 'day',count: 1, text: '1d' }, 
    {type: 'day', count: 2, text: '2d' }, 
    {type: 'day', count: 7, text: '1 wk' }, 
    {type: 'day',count: 14, text: '2 wk'},
    {type: 'month', count: 1, text: '1m'}, 
    { type: 'year', count: 1, text: '1y'}, 
    {type: 'all',  text: 'All'}]

}