Conor Gallagher has now shared what Mauricio Pochettino changed at half-time that helped Chelsea turn things around tonight. The midfielder told Sky Sports that the different structure the manager introduced for the second half helped them get back into the game, and ultimately win it late. Gallagher found a second half brace to help the Blues pick up a dramatic win against Crystal Palace tonight. After going a goal down in the first half, the Englishman hit the net twice before Enzo Fernandez stuck the dagger in the final moments. The Blues were woeful in the first 45, with many wondering wha…