[v11.0.x] Nodegraph: Fix issue with rendering single node #86195
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Fix for single node graph case (cherry picked from commit aba6574)
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area/frontend
area/panel/node-graph
backport
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Backport aba6574 from #84930
If a single node without any edges was passed to node graph it would error out:
This happened because for the specific DOT syntax used by the layout engine, nodes were extracted from the edges which does not work for single node graphs or for graphs where some nodes have 0 edges.