expand all tree nodes

Author: tschie

src/main/java/com/esri/samples/geometry/spatial_relationships/SpatialRelationshipsSample.java

@@ -121,8 +121,11 @@ public void start(Stage stage) {
       rootItem.setExpanded(true);
       relationships.setRoot(rootItem);
       TreeItem<String> pointRelationships = new TreeItem<>("Point");
+      pointRelationships.setExpanded(true);
       TreeItem<String> polylineRelationships = new TreeItem<>("Polyline");
+      polylineRelationships.setExpanded(true);
       TreeItem<String> polygonRelationships = new TreeItem<>("Polygon");
+      polygonRelationships.setExpanded(true);
       rootItem.getChildren().addAll(Arrays.asList(pointRelationships, polylineRelationships, polygonRelationships));
 
       // and a mouse click listener to identify the selected graphic