[gatein-dev] Update behaviour of PageNavigation.merge

Currently when we are using the extension mechanism, we do not properly merge the child PageNodes. What happens if that if the child PageNode already exists it will overwrite the old PageNode with the new one. Since PageNodes also has children PageNodes we are stuck in a situation where we can only handle the top level of PageNodes tree. We cannot currently use the extension mechanism to add a new page node anywhere in the page node tree. Jira with patch which merges the child nodes together: https://jira.jboss.org/browse/GTNPORTAL-1605 I would have committed this, but it does change the behaviour of how this works. Ie if someone was using the extension mechanism to overwrite an existing page node. Is anyone using it in this manner? Do we need to add an extra option to pageNavigation which will tell it overwrite or not overwrite when merging?