Model Extension Definition (MED) Management Dialog Should Allow Model MEDs To Be Updated From Registry And Saved To Workspace

The MED management dialog needs to show when model MEDs are either (1) not registered, or (2) are of a different version than the one in the registry. For the former case, the dialog should offer to save that MED in the workspace. For the latter case, the dialog should ask if the MED in the model should be updated to the registry version.