Recollections of Britain's arch-glam gods generally inspire two theories of their producers, Mike Chapman and his partner, Nicky Chinn. Either they knew just what they were doing and calculated accordingly, or blindly hit pay dirt, following toothless early singles like "Funny Funny" (none of which grace this disc). By this reckoning, Sweet was a '70s-era pinup band or a closeted hard rock quartet who only got their due after breaking the Chapman/Chinn combination…