We can go to the next dialog when chaining dialogs and the related item doesn't have to be saved into JCR yet. This results into two problems:

1. The content change event is triggered after closing each dialog.
2. The tree is trying to select the item which doesn't exist yet. This results in a bug when adding a node at the root level since it tries to expand JCR root node (instead of the child which isn't saved yet) which is not part of the container.

   2016-04-29 09:43:21,969 WARN  agnolia.ui.workbench.tree.HierarchicalJcrContainer: Cannot determine parent for itemId: info.magnolia.ui.vaadin.integration.jcr.JcrNewNodeItemId@303012d2: javax.jcr.ItemNotFoundException: Root node doesn't have a parent