A pert, sassy American TV leading lady and comedienne, Delta Burke, a former Miss America contestant, has kept very busy on primetime during the 1980s and 90s, most memorably as flirtatious but sometimes bitchy Southern belles. Burke's wide-eyed, rapid-fire line delivery and scene-stealing comic timing enlivened just such a role in "Designing Women" (CBS, 1986-91), a successful sitcom about four high-profile but highly diverse interior decorators. Unfortunately, Burke has also made tabloid news with her weight problems, her temperament-induced spats with producers, and her marriage to TV actor