The long-time chief executive of the Council of Fashion Designers of America (CFDA) announced he was stepping down, days after he was filmed physically restraining two protesters during an altercation at a New York runway show.“I am enormously proud of what we have built together and believe this is the right moment for both me and the organisation to begin a new chapter,” Steven Kolb said in a statement on Friday.Kolb is stepping down after two decades leading the council, which is known as...