Managers can demote each other.

So basically, if there is more than 1 manager, they can demote each other. They can't remoke, but they can demote AND remoke. (they can press the coal for an example to demote them to a visitor, press it again to completely remoke them) This can be really abusive if found out by griefers as they can just demote every single other manager while the owner is offline and can grief the entire map.

Steps to reproduce:

1. Make 2 people Manager on a map.
2. The first manager can demote the second manager. And so can the second manager demote the first manager. But CANNOT remoke without demoting first.