I know it's just a small change, but it would be nice to have the IntegerSpinnerInput not needing a maximum value.
If one does not want to limit to the user in his or her choice of value one has to set the maximum value to an extremely large value and that also seems like bad code practice.
This could be done by letting one type in 0 for both minimum and maximum value to set the spinner to unlimited. (Limited only by the maximum value of the data type of course)