CANADA STOCKS-TSX steady as ECB holds rates, U.S. jobs data eyed

* TSX up 4.73 points, or 0.04 percent, at 12,150.41 * Seven of 10 main index sectors advance * RBC rises and is biggest positive influence on index By John Tilak TORONTO, July 4 (Reuters) - Canada's main stock index was little changed on Thursday after the European Central Bank held interest rates steady, but dealings were thin due to the U.S. Independence Day holiday and as the market awaited a key U.S. jobs report on Friday. The European Central Bank said it plans to keep