**Unconneced nodes removed by default**
It was a switch before, but now all unconnected nodes will be removed - they provide no value or insight and.
**Self-Loops removed**
When `A1` contains `=A1` there is no value in representing that reference. If it is `=A1*A2` we have a dependency to another cell, `A2` and this is what we are after.
So no more selfloops either.