title: add fields to edmx after update
body: <p>I have a procedure with and old object context ef data model that I converted to tt and object context.</p>
  
  <p>At this point I have a thing to do: with old version of ef data model wizard, finding a field in a table with a foreign key reference, in the data model was added just the navigation property, and not the field property. This behavior has been changed in ef 4, adding but, but this model is done with first ef version, and I would like to fix it.
    How can add the field properties in this existing model?</p>
  
  <p>Luca</p>