prevent activations with an empty slist; check that the portfolio metadata is not empty on sketch.json validation
prevent activations with an empty slist; check that the portfolio metadata is not empty on sketch.json validation

bdurrow/design-center,bdurrow/design-center,bdurrow/design-center,tzz/design-center,tzz/design-center,tzz/design-center,tzz/design-center,bdurrow/design-center