Double slider

[amoharana]

A good enhancement would be the addition of double slider widget.  Double slider acts as a composite of 2 sliders where the maximum of the min slider is automatically updated to the value of max slider and the minimum of the max slider is updated to the value of the max slider.  It can be used to get values as ranges with min and max values.

A workaround of this is using 2 sliders and updating it- but a widget would add to its use especially in my field of mining engineering where most of the calculations are done within particular ranges.