Wrong quest steps sorting order

[Kreozot]

The current sorting algorithm doesn't always work correctly — it depends on the initial array order. Sometimes it completely misplaces items.

To achieve the correct sorting of a linked list structure using only a comparison function within the constraints of GDScript's sorting mechanism is not straightforward because the sorting mechanism relies on comparing two elements at a time in isolation. However, the sorting of a linked list structure inherently depends on the global order of elements, not just on pairwise comparisons.

I will prepare a PR to fix this. Thank you for your work!