How to use HTML tags in a Chart Legend?

问题

How can use HTML tags in a chart legend while using title to apply custom legend text?

If we apply something like this title:['Your<b>New</b><br />Label'] the tags are just written as plain text.

Ext.application({
    name: 'Fiddle',

    launch: function () {
        var store = Ext.create('Ext.data.JsonStore', {
            fields: ['name', 'data', 'data2'],
            data: [{
                'name': 'metric one',
                'data': 10,
                'data2': 2
            }, {
                'name': 'metric two',
                'data': 27,
                'data2': 5
            }]
        });

        Ext.create('Ext.chart.Chart', {
            renderTo: Ext.getBody(),
            width: 500,
            height: 300,
            animate: true,
            store: store,
            legend: {
                position: 'right'
            },
            axes: [{
                type: 'Numeric',
                position: 'left',
                fields: ['data', 'data2'],
                label: {
                    renderer: Ext.util.Format.numberRenderer('0,0')
                },
                title: 'Sample Values',
                grid: true,
                minimum: 0
            }, {
                type: 'Category',
                position: 'bottom',
                fields: ['name'],
                title: 'Sample Metrics'
            }],
            series: [{
                type: 'column',
                axis: 'left',
                highlight: true,
                stacked: true,
                tips: {
                    trackMouse: true,
                    width: 140,
                    height: 28,
                    renderer: function (storeItem, item) {
                        this.setTitle(storeItem.get('name') + ': ' + storeItem.get('data') + ' $');
                    }
                },
                label: {
                    display: 'insideEnd',
                        'text-anchor': 'middle',
                    field: 'data',
                    renderer: Ext.util.Format.numberRenderer('0'),
                    orientation: 'vertical',
                    color: '#333'
                },
                xField: 'name',
                yField: ['data', 'data2'],
                title: ['Your<b>New</b><br />Label']
            }]
        });
    }
});

来源：https://stackoverflow.com/questions/21876180/how-to-use-html-tags-in-a-chart-legend