By Chuck Mikolajczak NEW YORK (Reuters) – The U.S. dollar edged higher on Wednesday as the latest developments in the Ukrainian crisis dented investor appetite for risk, as a sell-off in the equity market helped drive a safe-haven bid for the greenback. After spending the early part of the day lower, the dollar began to strengthen as the situation in Ukraine intensified and U.S. stocks gave up initial gains, and the U.S. State Department said a full-scale Russian invasion of Ukraine remains potentially imminent. The United States and allies unveiled more sanctions against Russia, with European…