/// <summary>
/// Hides the specified menu entry.
/// </summary>
private void HideEntry(MenuEntry entry)
{
_visibleEntries.Remove(entry);
_entriesSprite.Remove(entry.Sprite);
}
/// <summary>
/// Shows the specified menu entry at a specific position.
/// </summary>
private void ShowEntry(MenuEntry entry, int position)
{
_visibleEntries.Insert(position, entry);
_entriesSprite.Add(entry.Sprite);
}