The Broadway community mourns the loss of actor Kyle Jean-Baptiste, who passed away early Saturday morning at age 21. The marquee of Broadway's Imperial Theatre, 249 West 45th Street, will be dimmed in his memory on Tuesday, September 1st at approximately 1015 pm following the evening performance of LES MISERABLES where he made history on July 23 when he became the first African American actor, and the youngest perso…