Due to our intranet (and probably some network restraints) we have several ESRI default widgets that don't work properly. I'd like to remove them from the Builder widget panel's default widget tab. I have tried removing a widget from the widgets/widgets-manifest.json file (nothing happens), removing a widget from the widgets/widgets-manifest-builder.json file (causes a 404 error in the widget panel), and placing an entry in the main config.json widget pool's widget list (label, uri, and visible properties) (nothing happens). None of the widgets I want to remove has an explicit manifest.json file in its directory. "Visible" does not appear to be a widget manifest attribute.