I have been creating a y/n field, called system or systemfield, and manually assigning all the system fields to it.

The properties pane in the tree view then is much easier to read, and works better for me, in that I know what fields have been created (non-system).

 

It would be great to either have this a stock feature (and able to pick-up new system fields you add), or an easier way than my manual one-by-one method.