TreeNavigation doesn't expand when directly visited URL is nested two or more layers

[MelvinFrohike]

This seems like a continuation of issue #5:

Suppose I have a structure like this:

• Parent Group
  • Leaf Item no. 1
  • Child Group
    • Leaf Item no. 2

When visiting Leaf Item no. 1 directly by entering its URL in the browser, Parent Group is automatically expanded as I would expect. When visiting Leaf Item no. 2 directly, nothing is expanded. I would expect both Parent Group and Child Group to be expanded. When I set autoOpenLevel to 1, Child Group gets expanded correctly. If I had other groups next to parent group, they would get expanded as well which is not what I want.

I am using manually defined items.