User tests: Successful: Unsuccessful:
I have a pull request (#677) running on the platform that deprecates JNode and JTree, two broken classes that are (almost) nowhere used. Except for the backend menu of the CMS. This pull request removes the reference in the backend module to that class. If at some point a proper implementation of JNode and JTree are implemented, the module could be rewritten to use those. For the moment it's best to just copy that code over.
Just FYI, my proposed work with the admin menu will end up removing this. It uses the same concepts as the frontend menu for the most part.