Add ranges as evaluation result when selection not complete

[Matthias Schoettle]

Currently, when having a non-complete selection for a reuse, the evaluator gives back always a specific number. See the following example, where nothing is selected:

Therefore, we decided to add ranges, which will be shown whenever there is no full selection made and show the possible range that is left. For the given example, the evaluation result would be [0, 100].

I.e., ranges are always shown unless the interval is [n, n], which can be shown as n.