Fix slot desync

General patch fixing slot desyncs between the server and client that
result from cancelled events/paper introduced logic.

Co-authored-by: Minecrell <minecrell@minecrell.net>
Co-authored-by: Newwind <support@newwindserver.com>

paper-server/patches/sources/net/minecraft/world/item/BlockItem.java.patch

@@ -61,7 +61,7 @@
 +                            if (placeEvent != null && (placeEvent.isCancelled() || !placeEvent.canBuild())) {
 +                                blockstate.update(true, false);
 +
-+                                if (this instanceof SolidBucketItem) {
++                                if (true) { // Paper - if the event is called here, the inventory should be updated
 +                                    ((ServerPlayer) entityhuman).getBukkitEntity().updateInventory(); // SPIGOT-4541
 +                                }
 +                                return InteractionResult.FAIL;