Replace core framework usage of Reflex with WithDict classes.

This is the first attempt at replacing all usage of Reflex in
the core framework with the xxxWithDict translation classes.

The TypeWithDict class interacts with a new low-level Root
class named TType, at least temporarily.  This will probably
change as we debug and further refine our needs.

This code just compiles, it has not been debugged.  That is
it does not work yet.  Yes, we know.