*PropertyBase vs Simple*Property

[Richard Bair]

> Is the Java8 plan still there if not should the current Simple*Property
> subclasses who overload invalidated be changed to PropertyBase?

It is unlikely that we'll be able to do anything major here in Java 8 just because we don't really have Lambda yet that we can play with, and changing over every property is a big job. Unless we knew it would be a major win. I would say, if you encounter a Simple* property that has been subclassed, then we should fix it up as we go to be a PropertyBase* guy instead.