HD programming picks for July 31-Aug. 6: “Jaws,” “Sunrise Earth: Tropical Palms,” “Weekend at Bernie’s” “Jaws” (HDNet Movies). Sat., Aug. 2, 8 p.m. Cue John Williams’ ominous theme music as Steven Spielberg’s 1975 thriller redefines the term “chum” for a generation of beachgoers. “Sunrise Earth: Tropical...