The Port Authority took a significant step Thursday to honoring a commitment to right the wrong from 40 years ago by providing better access from the city’s south ward and Dayton neighborhood to Newark Airport. Several officials praised the project for fixing a problem created four decades ago when a federal rule prevented building access from the nearby Newark and Elizabeth neighborhoods to airport rail station and the AirTrain monorail system. On Thursday, Port Authority commissioners approved allocating $160 million to develop, design and build an overpass, elevators and a ground transporta…