Touchscreen support slider

[coen]

Since a lot of consumers are buying smartphones and tablets these days, it is important that websites and website elements also support touchscreens.

I have tested the slider with different versions and all have the same problem. You cannot drag a slider from left to right on a touchscreen. You can only tap on the slider where you want the cursor to be. But if you have a range slider that also doesn't work.

So my bug/feature request is, if its possible to update the slider so it also works great on touchscreens like smartphones and tablets.

[Scott González]

Duplicate of #4143.