The Historic and Design Review Commission on Wednesday approved the partial demolition of a historic structure on the site of the future home of Rosario’s Southtown location on South St. Mary’s Street. Andrew Douglas of Douglas Architects Inc. filed the request in November on behalf of Rosario’s owner and restaurateur Lisa Wong. It calls for partial demolition of a caliche stone structure that once housed El Mirador while incorporating the rest of the structure into the planned two-story Rosario’s restaurant…