By Sinéad Carew and Dhara Ranasinghe NEW YORK/ LONDON (Reuters) -MSCI's global equities gauge regained some ground on Monday after Friday's steep sell-off as U.S. President Donald Trump softened his tone on the U.S.-China trade war, but safe-haven gold hit fresh record highs in a sign that uncertainty remained high. On Friday Trump had threatened 100% tariffs on China from November 1 in response to China's curbs on exports of rare earth elements. During the weekend, Beijing defended its move as a respons ...