By Joice Alves LONDON (Reuters) – Commodity currencies Norwegian crown and the Australian dollar recovered some ground on Tuesday after hitting their lowest levels in nearly two years against the U.S. dollar, tracking a rebound in European and Chinese stock markets. But traders said sentiment remained fragile and was keeping the safe haven dollar near a 20-year high, while risk aversion kept the euro flat. Commodity currencies fell overnight to multiple-year lows and oil prices fell more than 1%, hurt by fears of recession and an economic slowdown in China, the top oil importer, before trimmin…