Don't propagate MG layer/group shown/hidden state to the url if the arrays are empty (as is the case of the generic context).
Don't propagate MG layer/group shown/hidden state to the url if the arrays are empty (as is the case of the generic context).

jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout