Were it not for the Nazi collaboration, it would be hard not to warm to the woman who declared “How I loathe passion! What an abomination” and hoped she had “helped kill off” eccentricity, even before you got to the talent that would see her rise from impoverished, brutalised, motherless child raised by nuns to global icon who built a business empire and changed how women dress for ever. Coco Chanel Unbuttoned, a film-length documentary about the life of the designer, concentrates as you might expect rather more on the fashion side of things than the involvement of Gabrielle (as...