Sorting of q-points when plotting

In !158 (merged) the sorting of q-points by length was removed. This means that users have to sort q-points "by hand" for plotting, e.g., in the CsPbI3 example. Do we want to provide a keyword sorted, which defaults to False? One could make a minimal test with a selected set of q-points to avoid the problem that led to !158 (merged).