private static void addHeader(String labelText, ToggleButton btn, Integer size, VBox content) {
HBox headerRow = new HBox(size);
Label lname = new Label(labelText);
lname.getStyleClass().add("popover-label");
btn.setPrefSize(50, 10);
// this is so everytime user closes popover in edit, and when user
// revisits it popover is
// in edit mode
btn.setSelected(false);
headerRow.getChildren().addAll(lname, btn);
content.getChildren().add(headerRow);
}
