Once I was winning a game, then I made a mistake and wanted to undo. Unfortunately I did it too fast and pressed the resign button instead. I ended up “resigning”
That is unfortunate.
But the buttons are located on opposite sides of the column, and resignation has a pop up confirmation… So the same mistake should be easy to avoid now that you know? 
Feel free to suggest an alternative, but I am not sure we need even more warning signs…
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Go to setting and enable submit button or double click, to avoid misclick.