CANBERRA (Reuters) - Australian Prime Minister Julia Gillard convincingly won a leadership vote against rival Kevin Rudd Monday as opinion polls show her unpopular minority government was clawing back voter support despite the bitter and public leadership brawl. In her victory news conference Gillard said the fight in the Labor party had been "ugly" and Australians were fed up with the political brawl, but promised her government would now unite and put voters first, adding she was convinced Labor could win the next election due by mid-2013. "Today I want to say to Australians... ...