By Gertrude Chavez-Dreyfuss and Vidya Ranganathan NEW YORK/SINGAPORE (Reuters) – The dollar edged higher on Monday in thin and choppy trading, in line with higher U.S. Treasury yields as investors braced for multiple half a percentage-point rate hikes this year from the Federal Reserve. Volume was light on the day with Hong Kong, European, and Australia, and New Zealand markets closed for Easter Monday. The dollar index, a gauge of the greenback’s value against six major currencies, rose 0.1% to 100.61. Late last week, the index hit its highest in two years. “There is indeed history that when …