UPDATE 2-US court upholds Dish contempt filing, TiVo soars

failed to disable infringing recorders * Asks lower court to revisit portion of case * Ruling positive for TiVo -- analyst * TiVo shares jump 38 pct By Liana B.Baker (Adds analyst quote, Dish and TiVo statements) NEW YORK, April 20 (Reuters) - A U.S....