Continue normalize next child when and only when the node exists still (#1538)
Continue normalize next child when and only when the node exists still (#1538)

* Continue normalize next child when and only when the node exists still

* use the refindNode and refindPath provided

* Use Array.includes instead of Array.indexOf

ashutoshrishi/slate,isubastiCadmus/slate,ianstormtaylor/slate,ianstormtaylor/slate