Materialize library is great but dangerous so we should treat it as such

In the wizard tell what will happen, currently it does:
"Copy selected jars from 'classpath container name' to the destination folder."

which is fine, but in case of Maven it actually also removes the Maven nature.
Thus I would add to the description if the container is the Maven Nature "This will also remove the Maven configuration from this project". or something similar.

When pressing Finish the user should be repeated that info + a "This operation cannot be undone, are you sure ?"