Relative sizes don't work if a relative -fx-font-size is used on the same node

[tomsontom]

This is a clone of https://bugs.openjdk.java.net/browse/JDK-8204568 running the following application

package bla;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;

public class RelativeFontIssues extends Application {

	public static void main(String[] args) {
		launch(args);
	}

    @Override
    public void start(Stage primaryStage) throws Exception {
        System.err.println("Default Font: " + Font.getDefault().getSize());
        System.err.println("    0.2857142857142857em == " + 0.2857142857142857 * Font.getDefault().getSize());
        System.err.println("    0.3333333333333333em == " + 0.3333333333333333 * Font.getDefault().getSize());
        
        BorderPane pane = new BorderPane();
        pane.setStyle("-fx-font-size: 14");
        
        Label b = new Label("Default");
        b.setStyle("-fx-padding: 0.2857142857142857em; -fx-background-color: red; -fx-background-radius: 0.2857142857142857em");
        Label b2 = new Label("Relative size");
        b2.setStyle("-fx-padding: 0.3333333333333333em; -fx-font-size: 0.8571428571428571em; -fx-background-color: red; -fx-background-radius: 0.3333333333333333em;");
        pane.setCenter(new HBox(b,b2));
        
        Button flip = new Button("Flip size");
        flip.setOnAction( e -> pane.setStyle("-fx-font-size: 28"));
        
        Button print = new Button("Print info");
        print.setOnAction( e -> {
            System.err.println("============");
            System.err.println("Default:");
            System.err.println("    Padding: " + b.getPadding()); // expected 4 & 8
            System.err.println("    Corner: " + b.getBackground().getFills().get(0).getRadii()); // expected 4 & 8
            System.err.println("	Font: " + b.getFont());
            System.err.println("Rel:");
            System.err.println("    Padding: " + b2.getPadding()); // expected 4 & 8
            System.err.println("    Corner: " + b2.getBackground().getFills().get(0).getRadii()); // expected 4 & 8
            System.err.println("	Font: " + b2.getFont());
        });
        pane.setBottom(new HBox(flip, print));
        
        Scene s = new Scene(pane, 500, 500);
        primaryStage.setScene(s);
        primaryStage.show();
    }

}

Now execute the following steps:

• Click "Print info"
• Click "Flip size"
• Click "Print info"

Default Font: 13.0
    0.2857142857142857em == 3.714285714285714
    0.3333333333333333em == 4.333333333333333
============
Default:
    Padding: Insets [top=4.0, right=4.0, bottom=4.0, left=4.0]
    Corner: CornerRadii [uniform radius = 4.0]
	Font: Font[name=System Regular, family=System, style=Regular, size=14.0]
Rel:
    Padding: Insets [top=4.3, right=4.3, bottom=4.3, left=4.3]
    Corner: CornerRadii [uniform radius = 4.3]
	Font: Font[name=System Regular, family=System, style=Regular, size=12.0]
============
Default:
    Padding: Insets [top=8.0, right=8.0, bottom=8.0, left=8.0]
    Corner: CornerRadii [uniform radius = 8.0]
	Font: Font[name=System Regular, family=System, style=Regular, size=28.0]
Rel:
    Padding: Insets [top=4.3, right=4.3, bottom=4.3, left=4.3]
    Corner: CornerRadii [uniform radius = 4.3]
	Font: Font[name=System Regular, family=System, style=Regular, size=24.0]