selectedNode unselects when grandparent is collapsed

[CaptainLexington]

Can be seen on the plunker: http://plnkr.co/edit/mAfWCLmD9NW0CD44gdNF?p=info

Steps to reproduce on plunker:

1. Expand parent2
2. Expand child
3. Select innerChild.
4. Collapse and re-expand child, noting that innerChild is still selected.
5. Collapse and re-expand parent2 and and child, and see that innerChild is no longer selected.