Simplified unselect all

src/main/java/fr/ill/ics/n3d/gui/EditorMenuBar.java

@@ -2554,9 +2554,11 @@ public class EditorMenuBar extends MenuBar {
 			@Override
 			public void handle(ActionEvent event) {
 				
-				System.out.println("Unselect all...");
+				List<Component> selectedComponents = Nomad3DEditor.getInstance().getModel().getSelection();
 				
-				updateScene();
+				for (Component component : selectedComponents) {
+					component.getTreeItem().selectedProperty().set(false);
+				}
 			}
 		});