LONDON (Reuters) - World shares touched a 21-month high on Monday on signs that the United States and China could soon put an end to a damaging trade war as well as indications that the world may yet dodge an economic recession.Beijing and Washington spoke on Friday of progress in talks aimed at settling a trade dispute that has bruised the global economy and repeatedly shaken financial markets, with U.S. officials saying a deal could be signed this month.The MSCI world equity index , which..