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I found some free time to make some code, that makes a possibility of selecting and deselecting stack faster. I didn't touched greeting for the game, where information about this feature should be placed, I hope, you ll do it and maybe my PR will give you some inspiration to make other features from "issues" tab=)
P.S. I tested this new feature, no problem detected. But as you're a "father" of this game, you can find mistakes in my patch, so pay attention to this code.