Mikaela Shiffrin tied with Lindsey Vonn, winning her fourth overall World Cup skiing title of her career on Thursday at the World Cup Finals in Courchevel, France. The American record-holders trail the all-time record by Austrian Annemarie Moser-Proll, with six titles in the 1970s. Following a surprise third career victory in the downhill the day before, Shiffrin secured the overall…