Adding a TreeItem before the selected item does not correctly update the selection. Below is a test scenario added to TreeTableViewTest. For now It is ignored using this JBS issue.

@Test public void testSelectionUpdatesCorrectlyAfterAddingAnItemBeforeSelectedItem() {
        setupForPermutationTest();
        TreeItem<String> parentOfSelectedTreeItem = ((TreeItem<String>)sm.getSelectedItem()).getParent();
        int indexOfSelectedItem = parentOfSelectedTreeItem.getChildren().indexOf(sm.getSelectedItem());
        if (indexOfSelectedItem > 0) {
            indexOfSelectedItem--;
        }
        parentOfSelectedTreeItem.getChildren().add(indexOfSelectedItem, new TreeItem("AddingOne"));
        verifySelectionAfterPermutation();
    }