Retroactively Populate Feature Fields

Current Behavior: We have been using some custom fields on ideas for awhile now and have just recently added these fields to the Feature layout.  But unfortunately the fields are only populating on the Feature if the Idea was Promoted AFTER we added the fields to the Feature layout - meaning it's impossible to see all of the current custom Fields on any sot of Feature View.

Expected Behavior: If a custom field is populated on an Idea that has been promoted to a Feature, and the custom field is then added to the Feature layout - populate/display the custom field values on the Features that were created before the layout was updated.