“The dispiriting quality of last Tuesday’s nominations for the Tony award — including double-digit nods for “The Drowsy Chaperone” and “The Color Purple” — are hardly cause for celebration. True, bulletins on the musical’s failing health have been posted with weary regularity since at least the 1960’s. But in the Broadway season that just ended officially, this once lively art seemed finally to have crossed the border that divides flesh from ectoplasm.”