Make pre-defined property page non-movable

Fixed properties are fixed for a reason therefore prevent a property page that represents a pre-defined property to be non-movable.

Relates to #600.
> The entry point is a registry class where functional logic like && is the wrong place to add a behavioral change to an argument therefore keeping the TitleIsMovable class for executing such change.

I see what you are saying, though think it's not the best trade-off you can make in this case. Having this trivial "and" in the hook is really not going to cause an issue, while avoiding that forces you into a rather odd design. I think this oddness is more of an issue than having the "and" in the hook handling function.