Mine Papers Online

## Added
- Inset: a gap between the image and the canvas edges.
- Lock: only the player who locked a picture can edit it. A locked picture can't be disassembled.
- Picture description:
  - A title, shown when you look at the picture.
  - A description, shown together with the title when you open the picture.
- Signature: signing freezes the picture forever and gives the item an enchantment glint.
  - Look at a signed picture while holding Shift to see the signer's name. If the picture has a title, they are shown together.
- The picture settings screen can be opened by right-clicking with the picture in hand.
- In Creative mode, pasting a config no longer requires the blocks to be in your inventory.
- Number values can be changed with the arrow keys and the mouse wheel.
- The ability to mark a picture as NSFW so that other players can hide it.

## Changed
- New pictures now use the original colors by default.
- Style settings: radio buttons replaced with sliders, like in Immersive Paintings.
- Frame settings: the Edges button is no longer disabled. Turning it on enables the block canvas automatically.
- Padding is now called Inset, and it can now enlarge the image as well as shrink it.

## Fixed
- Fully transparent pictures could get lost in the inventory.
- Breaking a picture showed cracks, which could cause visual glitches.
- Breaking a picture no longer spawns particles.