Update Shadow, Hidden Shadow, and False Shadow Blocks

[superworldsun]

Update all 3 of the shadow blocks. [Shadow, hidden shadow, false shadow blocks] with the same ability

When the player is holding the block and is holding sneak + right click on another solid/full block, the Shadow blocks will take the appearance of the block that was sneak clicked. The entire stack being held will stay that texture.

To remove the texture, the player must Sneak + Left click.

When the player places the block it will keep the texture of the one that has been copied onto the block from the Sneak + Right click.