[Feature Request] CLOSECONTAINER and CLOSEVENDORMENU

[canerksk]

	case CV_CLOSECONTAINER:
	{
		const CItem* pItem = pItem;
		if (s.HasArgs())
		{
			CGrayUID uid = s.GetArgVal();
			if (!uid.IsItem())
				return(false);
			pItem = uid.ItemFind();
		}
		if (pItem)
			closeUIWindow(pItem, PacketCloseUIWindow::Container);
	}
	break;

	case CV_CLOSEVENDORMENU:
	{
		const CChar* pChar = m_pChar;
		if (s.HasArgs())
		{
			CGrayUID uid = s.GetArgVal();
			if (!uid.IsChar())
				return(false);
			pChar = uid.CharFind();
		}
		if (pChar)
			addVendorClose(pChar);
	}
	break;

The codes here are purely examples. Although many have been tested, some may need to be rewritten.