(Reuters) – Marcus Rashford and Jadon Sancho may have been overlooked for next month’s Nations League fixtures, but England manager Gareth Southgate says the Manchester United duo can still make the World Cup squad if they can get firing for their club. Both forwards have been out of favour since England’s defeat by Italy in the European Championship final last year. They were left out once against when Southgate named his squad on Tuesday for games against Hungary, Italy and Germany. Southgate, however, said they still had enough matches remaining at club level to show their quality and chang…