At the moment, our sliders allow you to click the track and the thumb animates to the point of click. This is nice, but it's not the whole deal. If you initiate a drag on the track, the thumb should snap to the mouse position and then follow the mouse. In other words, you should be able to start dragging the thumb directly from the track.

Sliders do not do this today which means if the user wants to explore a range of values they must click on the thumb and drag. This requires more accurate mouse positioning resulting in a slower, more tedious experience.

This change would make UI with multiple sliders (such as our ColorPicker) much quicker/nicer to use.