"It's about time the Americans gave her back.” That’s Shane Allen, controller of comedy commissioning at the BBC, on the return of Tracey Ullman to British television. After many years working in the U.S., the BAFTA- and Emmy-winner is prepping a new comedy series for BBC One. While a different entity, the six-part The Tracey Ullman Show shares its name with Ullman’s 1987-1990 Fox series which famously gave life to The Simpsons (the family was introduced in animated…