function restoreFallenApple(apple) {
    //as in hideFallenApple we need to wait and the make the html element visible
    //restore the top value
    apple.style.top = apple.getAttribute('data-top');
    setTimeout(function () {
        apple.style.display = 'inline-block';
    }, 501);
}
Shows the provided element by changing the display property and restores top position.
@param {HTMLElement} apple