Control bar

Abacus

Is it possible to place the 'Undo' button at the first position of the control bar, before 'New Game"? By holding a tablet like the iPad the thumb of the left hand will be exactly on that spot when playing. At the moment you need your right hand to 'Undo', blocking the sight with your big hand to overlook the game. This, because 'right-clicking' is not possible on the iPad. That would be great....
Thanks,
Bart