Disable ball movement when only touched briefly

[yonimal676]

To prevent unintentional release of the ball, we'll only let the ball to get released
when its' distance from the initial point is < radius (width / 2f)

                if (ball.calcDistanceFromI(ball.x + fixX(), ball.y + fixY()) < ball.width / 2f)
                {
                    ball.x = ball.initialX - fixX();
                    ball.y = ball.initialY - fixY();
                }