Adding Premoves to Drills/ Drill Shuffle

When going through drills, it's not possible to premove the next move and you have to wait for the computer to make a move to make the next one. Having the ability to premove one move ahead can help players more quickly go through the first set of moves (like when you go through the first 4 moves in a certain variation that can be premoved since they don't change from one drill to the next).