Add BukkitPlayer constructor without plugin.

tbh I don't know why we even need to keep the plugin object around.

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitPlayer.java

@@ -52,6 +52,10 @@ public class BukkitPlayer extends AbstractPlayerActor {
     private Player player;
     private WorldEditPlugin plugin;
 
+    public BukkitPlayer(Player player) {
+        this(WorldEditPlugin.getInstance(), player);
+    }
+
     public BukkitPlayer(WorldEditPlugin plugin, Player player) {
         this.plugin = plugin;
         this.player = player;

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitServerInterface.java

@@ -100,7 +100,7 @@ public class BukkitServerInterface implements MultiUserPlatform {
             return player;
         } else {
             org.bukkit.entity.Player bukkitPlayer = server.getPlayerExact(player.getName());
-            return bukkitPlayer != null ? new BukkitPlayer(plugin, bukkitPlayer) : null;
+            return bukkitPlayer != null ? WorldEditPlugin.getInstance().wrapPlayer(bukkitPlayer) : null;
         }
     }
 
@@ -177,7 +177,7 @@ public class BukkitServerInterface implements MultiUserPlatform {
     public Collection<Actor> getConnectedUsers() {
         List<Actor> users = new ArrayList<>();
         for (org.bukkit.entity.Player player : Bukkit.getServer().getOnlinePlayers()) {
-            users.add(new BukkitPlayer(plugin, player));
+            users.add(WorldEditPlugin.getInstance().wrapPlayer(player));
         }
         return users;
     }