Fix duplicating node references of custom node type properties #112076
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Script assignment must be complete for the subtree in order to correctly assign into properties set to a script type.
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Fixes #102793
Fixes #110665
Issue was that script property of child nodes weren't assigned by the time a parent node's node properties were being processed. So
_duplicate_properties()would grab the correct node, butset()would fail from type checking since the node didn't have a script on it.#91329 caused the issue since it removed the property copy pass that would successfully do assignment since the first pass copied the scripts.
This fix ensures at least the script property is copied before trying to assign node properties. Couldn't only change the traversal order of
_duplicate_properties()since that would cause nodes with references to ancestors to fail assignment instead.