A measure of future U.S. economic growth rose modestly in the latest week, while the annualized growth rate also improved, a research group said on Friday.  The Economic Cycle Research Institute, a New York-based  independent forecasting group, said its Weekly Leading Index  edged up to 123.1 in the week ended Jan 27 from a revised 122.7 the previous week. That was originally reported as 122.8....