Martin Mull passed away at his home Thursday at the age of 80 due to a long illness. The versatile entertainer known for his roles on “Roseanne,” “Sabrina the Teenage Witch,” and in the cult classic film “Clue,” has passed away as announced by his daughter, Maggie Mull. Maggie took to social media Friday to mourn the death of her father. “I am heartbroken to share that my father passed away at home on June 27th, after a valiant fight against a long illness. He was known for excelling at every creative discipline imaginable and also for doing Red Roof Inn commercials. He would find that joke fu…