Change lower/upper threshold when changing scalar
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
In the threshold filter, the lower and upper threshold should be adjusted when the scalars value has changed. Right now when you first add the threshold filter, the values get set to the range of the first array. When you change to a different array, the lower/upper threshold remain at the range of the first variable. Thus, the threshold filter commonly presents the wrong range of values when first applying it.