Saturday mornings around Belvidere Park have their own tempo. Doors open. Somebody is washing a car. Mowers start one after another down the block like a conversation. MORALES LANDSCAPING is part of that sound through the warm months, cutting lawns, running the trimmer along fences and foundations, shaping hedges, and hauling the leaves out once the maples let go in October. The work is plain and the standard is not: straight lines, tight corners, walks blown clear, nothing left behind but the smell of it. In a Waukegan neighborhood, a well-kept yard is a kind of good manners toward everybody who walks past.