OK, if it is set up so you can select the 2 button mouse again, when it is already set to the 2 button mouse, you are right.
Another thing to think about. I kept it long in the first post, in case the file is modified in the future, and -mouse appears somewhere else. The way it is at present, it is not a problem.
If it is implemented, Robert can decide how he wants to do it. Maybe different again.