fires when the user makes a double click on a cell on the y-axis (the Timeline view only)
| index | number | the row index of the clicked cell (zero-based numbering) | 
| section | object | a data object of the clicked cell | 
| e | Event | a native event object | 
scheduler.attachEvent("onYScaleDblClick", function (index, section, e){
    //any custom logic here
});