Allow SpriteBatch and MenuItemSprite to share children

[totallyeviljake]

If a sprite has a parent as a sprite batch node and that sprite is used in a CCMenuItemSprite then it should not be drawn by the menu parent. Rather, it should be drawn in the sprite batch.

[totallyeviljake]

The problem with SpriteBatch is that it draws sprites relative to its own z-order. This is where the global-Z-order concept from cocos2d-x v3 is useful. Without applying the sprite batch to a global z ordering, the sprites that would be in the menu would be occluded by other sprites that occur after the sprite batch node in the node hierarchy.