sehv

//Fixes an issue with pinch zooming in previous versions of this fix: 
//zooming worked, but the Reset Zoom button never appeared. Changing which tracker event is called takes care of this.
//Tested in 4.1.4 on Android

Highcharts.Chart.prototype.callbacks.push(function (chart) {
    var hasTouch = document.documentElement.ontouchstart !== undefined,
        mouseTracker = chart.pointer,
        container = chart.container,
        mouseMove;