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During accessibility testing it was discovered that tree view in our wizard reads "Tree Node tree view" instead of the proper label that is specified. It turned out to be the problem with the tree component, where `ariaLabel` was hardcoded to "Tree Node", instead of the one provided in the options. This change addresses the problem by passing through `ariaLabel` from the options object to the underlying tree control. I also removed the default `Tree Node` hardcoded label, as it didn't make much sense. This does mean that all tree-views that do not explicitly specify their aria-label will now get an empty label. I think this is better than having unrelated, unlocalized `Tree Node`. I'm also worried about changes to the `ariaLabel` property after the component was initialized. I updated the code to propagate the value to the underlying tree view in the `setProperties` override of the tree component and hope that it will take care of it.