MANCHESTER, England — As May begins, attention in English football turns toward the trophies that are up for grabs at the end of the season. In recent years, no club has been as focused on winning as Manchester City, and now the club is on the verge of completing its most dominant campaign yet. On Saturday, Manchester City Women can lift the FA Cup and win the double against West Ham United Women at Wembley Stadium. The men’s team will attempt to win the same competition two weeks later when they take to the national stadium to play Watford, which would complete an unprecedented domestic treble if they can also hold off Liverpool in the Premier League title race. Both sides already have a trophy in the bag after the women and the men each won their respective league cups on the same weekend in February. Saturday is set to be a historic day for the women’s team, with a competition record 50,000 people expected to be at Wembley for the showpiece event for the women’s game in the UK. The transformation of both the team and the domestic game is evident. Six years ago, Manchester City Women was a…