Gold, silver lifted modestly by bullish outside markets Gold and silver prices are trading mildly higher in midday U.S. trading Monday. Bullish outside market that see the U.S. dollar index sharply lower and crude oil prices solidly higher are helping to lift the precious metals markets to start the trading week. A lack of fresh, markets-moving economic or geopolitical news early this week has metals traders looking at the outside markets for direction. August gold futures were last up $5.50…