Editable grid

// @@@ step1 - set selectionIndex to last row
// use Data or Row, what ever was used initially in set
// obj.setProperty("selection/index", obj.getDataProperty("count") - 1);
obj.setProperty("selection/index", obj.getRowProperty("count") - 1);

var row = obj.getRowCount() - 1;
    obj.setSelectedRows([row]);