Range: Clicking on marks label will not update the slider #599

Clicking on the mark labels of a range slider will not update the slider.

Steps to reproduce:

1. got to the http://react-component.github.io/slider/examples/marks.html
2. find the Range with marks or Range with marks and steps sliders
3. click on any label

Expected:

The slider should be updated, the nearest (or last changed) handler should jump on the above the label.

Result:

The slider is not updated, the handlers are not moved at all.

The problem as I can see is that the value passed from onClickMarkLabel is totally ignored and the bounds are not recalculated, so the onChange handler will be fired with previous bounds.