By Karin Strohecker WASHINGTON (Reuters) -The fresh flare-up in trade tensions between the United States and China is a big risk to the outlook for Thailand's economic growth, the country's deputy central bank governor said, adding there was little room left to lower rates further. U.S. President Donald Trump on Friday shattered a relative calm in the trade war between the world's top two economies by threatening 100% duties on Chinese goods - on top of rates averaging 55% - in retaliation for Beijing's ...