Fix to apply active and active-ancestor classes to nodes retrieved via getDescendants() #21
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This adds to the fix previously implemented for setting links for getDescendants but also applies the correct active classes.
I also had to make sure that we were only applying the classes once by deleting any existing occurrences of the classes in the class property, otherwise by the time you got to the last occurrence of getDescendants() in your twig, the active classes would have all stacked per the number of times you called getDescendants().