[Feature request] Audio/Vibro Feedback for 'Plus' and 'Minus' Buttons

[a-tokarev]

Please add the option to play a sound and to vibrate when pressing 'plus' and 'minus' buttons. This is very helpful when changing values while not looking at the screen. In this case it's rather easy to miss 'plus' and 'minus' buttons from time to time. (You think you've pressed the button, but you've actually missed, as it turns out later.) The audio/vibro feedback will make sure that the button has in fact been pressed, so that the total count will stay correct.