Threshold clamps too harsh
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
There is no way to insert values into the upper and lower threshold of the threshold filter that are below the minimum or above the maximum value. Although the slider should certainly be limited to this range, the user needs to be able to put in values beyond this range when typing into the spin box.
There are two reasons to do this. The first is that it is difficult to threshold on cells that are maximum. Selecting the upper bound a little past the maximum would solve the problem.
The second reason is that for inputs that change over time, different time steps will have different threshold ranges. The user may need to set the threshold beyond the current range in anticipation of a different range at a different time step. Furthermore, if the threshold values were changed because a new time step had new ranges, that would be super bad.