Multi World NPCs + patch on Player interactions

Made NPCs now work properly on multiworld system. Solved multiple issues
regarding Player Shops not giving back items properly when owner exits.
Added restriction on changing channels at FM rooms, preventing shop
owner entering Cash Shop.

src/client/MapleClient.java

@@ -721,41 +721,12 @@ public class MapleClient {
 		try {
 			player.cancelAllBuffs(true);
 			player.cancelAllDebuffs();
-			final MaplePlayerShop mps = player.getPlayerShop();
-			if (mps != null) {
-				mps.removeVisitors();
-				player.setPlayerShop(null);
-			}
-			final HiredMerchant merchant = player.getHiredMerchant();
-			if (merchant != null) {
-				if (merchant.isOwner(player)) {
-					merchant.setOpen(true);
-				} else {
-					merchant.removeVisitor(player);
-				}
-				try {
-					merchant.saveItems(false);
-				} catch (SQLException ex) {
-                                        ex.printStackTrace();
-					System.out.println("Error while saving Hired Merchant items.");
-				}
-			}
-			player.setMessenger(null);
-			final MapleMiniGame game = player.getMiniGame();
-			if (game != null) {
-				player.setMiniGame(null);
-				if (game.isOwner(player)) {
-					player.getMap().broadcastMessage(MaplePacketCreator.removeCharBox(player));
-					game.broadcastToVisitor(MaplePacketCreator.getMiniGameClose());
-				} else {
-					game.removeVisitor(player);
-				}
-			}
+                        
+                        player.closePlayerInteractions();
+                        
 			NPCScriptManager.getInstance().dispose(this);
 			QuestScriptManager.getInstance().dispose(this);
-			if (player.getTrade() != null) {
-				MapleTrade.cancelTrade(player);
-			}
+			
 			if (player.getEventInstance() != null) {
 				player.getEventInstance().playerDisconnected(player);
 			}
@@ -1236,7 +1207,7 @@ public class MapleClient {
 			disconnect(false, false);
 			return;
 		}
-		if (!player.isAlive() || FieldLimit.CHANGECHANNEL.check(player.getMap().getFieldLimit())) {
+		if (!player.isAlive() || FieldLimit.CANNOTMIGRATE.check(player.getMap().getFieldLimit())) {
 			announce(MaplePacketCreator.enableActions());
 			return;
 		}