React 19: ReactDOM.findDOMNode should be removed

[tlabaj]

Describe the enhancement or change
A clear and concise description of the request. What is the expected outcome?
React 19 has removed support for ReactDOM.findDOMNode. Use of this should be removed from the repo.

This is what a quick repo search showed. Please verify there is no use elsewhere:

[thatblindgeye]

Note: DropdownMenu from deprecated has been removed