The Toronto film festival began in a sombre mood on Thursday as theatres dimmed their lights for the passing of Queen Elizabeth II before a Netflix drama about Syrian refugees launched North America’s most prominent movie gathering. The Princess of Wales and Royal Alexandra theatres – both festival venues named for members of Britain’s royal family – switched off their marquee signs as news spread of the death of the Commonwealth monarch. “As we gather to celebrate the power of film to move us and to illuminate our world, I want to acknowledge the passing today of Her Majesty Queen Elizabeth I…