[BUG] Gremlin visualizer renders elementMaps incorrectly when custom id property is present

[michaelnchin]

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Describe the bug

This issue occurs running a %%gremlin query that returns path components in elementMap format. If the vertices in the path contain a custom id property, the visualizer confuses this with the default T.id token property, and renders the graph incorrectly.

When using WebSockets protocol, this issue manifests as duplicate, unconnected nodes in the graph.