Alicia Funderburk/Getty ImagesAMC Theaters has apologized to the Rev. William J. Barber II, a minister and prominent civil rights leader, after he was booted out of a screening of The Color Purple at one of its North Carolina theaters this week. The 60-year-old said the incident had occurred at a Tuesday afternoon screening in Greenville that he’d attended with his 90-year-old mother. His assistant attempted to set up a special chair—which Barber uses to manage a painful form of arthritis known