By Dhara Ranasinghe and Wayne Cole LONDON (Reuters) -World markets found steadier ground on Monday after being whipsawed by broadsides in the U.S.-China trade war, while gold hit new record highs in a sign that uncertainty remained high. While U.S. President Donald Trump had threatened 100% tariffs on China from November 1 and Beijing threatened countermeasures, he sounded more conciliatory on Sunday, posting that everything would be fine and the U.S. did not want to "hurt" China. European shares opened ...