Map chair patch + other minor fixes

Patched map chair skill not disposing heal task properly in case of player changing maps while resting.

src/client/MapleClient.java

@@ -1310,6 +1310,7 @@ public class MapleClient {
 				merchant.removeVisitor(getPlayer());
 			}
 		}
+                player.unregisterChairBuff();
 		server.getPlayerBuffStorage().addBuffsToStorage(player.getId(), player.getAllBuffs());
                 player.setAwayFromWorld(true);
 		player.cancelAllBuffs(true);