[1.187.101] Control group sync issues
Control groups are not properly removing cubes or syncing.
Steps to reproduce
1. join multiplayer server.
2. Build a grid.
3. Create some blocks that can be grouped.
4. Put them in a group.
5. grind one of the blocks.
6. replace that block with a different block.
7. check the control group. There should be one fewer blocks in that group.
8. reconnect to game.
9. Find the new block is now in that control group.
10. remove the new block. save the group.
11. reconnect to game.
12. Find the new block BACK in that control group AGAIN.
13. Throw a fit. Delete the group. and recreate it.
14. reconnect to game. and find all is normal.