Feature: add a Wheel listener to JSlider

It would be nice to have a wheel listener to the time / range slider.
It's a small change which is really nice. I don't know why it's not there by default with the JSlider

Example:

https://github.com/bigdataviewer/bigdataviewer-playground/commit/56e82bd957d95b07b7e023e2012032adae0ad30a