[ErrorAnalysis] show the intial path in the tree view

[imatiach-msft]

One user commented that they would like to see the initial paths in the tree view tool. When the tool first loads, it would be useful to see the tree paths before clicking on a specific node.

[romanlutz]

@imatiach-msft can you elaborate on what "initial path" means? I can see the tree from the root to the leaves, so it's a bit unclear to me which initial paths aren't visible.