No merging across document

[Garbash]

Expected behavior

When I rename a node with the same name as a node already existing in another doc I expect to be alerted that there's already a node with that name and I'm about to merge their properties together.
After confirming the merge, I expect the renamed node to inherit the properties of the existing node.

Actual behavior.

When I rename a node to a name of an existing node I don't get any prompt about it. The nodes are not coupled together and changes in properties don't get updated between them.

Steps to reproduce the problem.

1. Create node "funtime" in doc1.
2. Add value "hi" in property "description" of node "funtime"
3. Create node "worktime" in doc2.
4. Rename node "worktime" -> "funtime"
5. Click on property menu and see it didn't have the "hi" value in description like the node in doc1. Alos, Renaming it or changing properties don't effect the node in the other document