Can someone explain why there is a cancel button that does nothing but pop up a window to ask if your sure you want to cancel? There is no possible way to click on your tile, open it and accidentally double click in the same spot that you opened it to hit cancel, so other than to give the attacker an unfair advantage you have to click 3 times (twice after you open the tile) to make your army return and why is there not a cancel and return all button.

Also why if you click the yielding icon at the bottom you can click anywhere on the screen to close all the windows but if you actually click on the tile itself you have to click on the x or cancel button?