Bug - Tree view - selected state doesn't persist if parent node is collapsed

[mcoker]

https://www.patternfly.org/v4/components/tree-view/#default

If you select a node, then collapse and expand its parent, the node is no longer selected. It should remain selected.

Note: this is just for basic tree view nodes. Checkbox nodes and the new expandable/selectable nodes (from #7714) persist the node selection state as expected.

cc @kmcfaul