ATLANTA — With the dismissal of one of two lawsuits that effectively pitted them against each other, the Rev. Martin Luther King Jr.’s children took a step Thursday toward resolving the issues that have divided them in recent years. The Estate of Martin Luther King Jr. Inc. on Thursday voluntarily dismissed a lawsuit it had filed in August 2013 against the Martin Luther King Jr. Center for Nonviolent Social Change. Dexter Scott King is president and CEO of the estate, and Martin Luther King III is …