Can't select object in front of another selected

[ptravassos]

After selecting an object you can't select another object in front of it. It was not happening in older versions.

execute Kitchensink test (if you select de square then you can't select de circle)
// clear canvas
canvas.clear();
// remove currently selected object
canvas.remove(canvas.getActiveObject());
// add red rectangle
canvas.add(new fabric.Rect({
width: 150,
height: 150,
left: 50,
top: 50,
fill: 'rgb(255,0,0)'
}));
// add green, half-transparent circle
canvas.add(new fabric.Circle({
radius: 40,
left: 70,
top: 70,
fill: 'rgb(0,255,0)',
}));

[kangax]

Duplicate of #1188