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/MinecartItem.java.patch

@@ -1,12 +1,13 @@
 --- a/net/minecraft/world/item/MinecartItem.java
 +++ b/net/minecraft/world/item/MinecartItem.java
-@@ -67,7 +67,12 @@
+@@ -67,7 +67,13 @@
                  if (world instanceof ServerLevel) {
                      ServerLevel worldserver = (ServerLevel) world;
  
 -                    worldserver.addFreshEntity(entityminecartabstract);
 +                    // CraftBukkit start
 +                    if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityPlaceEvent(context, entityminecartabstract).isCancelled()) {
++                    if (context.getPlayer() != null) context.getPlayer().containerMenu.sendAllDataToRemote(); // Paper - Fix inventory desync
 +                        return InteractionResult.FAIL;
 +                    }
 +                    // CraftBukkit end