Item Frame Poser

Everything since 1.13.1.

The group screen got reworked. Everything's on the left side and along the bottom now, so you can actually see the frames you're grouping.

New Auto-add toggle in the group screen. Turn it on and every frame you place goes into the selected group. Frames other people place don't get added. It turns itself off a minute after the last frame you placed so you don't leave it on by accident, and the time left shows at the top of your screen.

Removed the drag selection from the group screen.

Client side only, the server doesn't need to update (update still recommended).