remove initowner from dialog (#547)

Co-authored-by: Rachael Ellen <[email protected]>

Author: Rachael-E

feature_layers/feature-layer-query/src/main/java/com/esri/samples/feature_layer_query/FeatureLayerQuerySample.java

@@ -100,7 +100,6 @@ public void start(Stage stage) {
 
       // create dialog to display alert information
       dialog = new Alert(AlertType.WARNING);
-      dialog.initOwner(stackPane.getScene().getWindow());
 
       // search for the state that was entered
       searchButton.setOnAction(e -> {