vfe = new ValueFieldEditor(...)
Takes exactly the same args as xvalue or xpvalue but is an object
which can change some features (default) under program control.
Note that when this object is created, there must be an open xpanel .
If the field editor is a default field editor then the current value
becomes the default value. ie. the red checkmark is turned off.
neuron/general/classes/vfe.hel : May 13 2012