modifying the List of error messages in ValidationTracker

[Ray Nicholus]

I'm trying to figure out a way to clear the list of error messages in
ValidationTracker without also clearing the state of the field tracker.  I
am attempting to create an aggregate of error messages for fields with the
same name in the ValidationTracker.  So far, I'm not seeing a way to
accomplish this since I am only able to call clear() on the
ValidationTracker which clears the state entirely.  As a result, I lose all
of the validation decorators around the fields in error.  Any ideas?