Scrollable achievement screen using Stage in LibGDX

public void testHud()
    {
        Table mainTable = new Table();
        mainTable.setFillParent(true);
        mainTable.pad(50);

        ScrollPane scrollPane = new ScrollPane(mainTable);
        scrollPane.setFillParent(true);

        scrollPane.setScrollingDisabled(true, false);

        mainTable.add(category("Word solving noob", true, true, true)).expandX().fillX().row();
        mainTable.add(category("Word solving medium", true, true, false)).expandX().fillX().row();
        mainTable.add(category("Word solving hard", true, false, false)).expandX().fillX().row();
        mainTable.add(category("Word solving insane", false, false, false)).expandX().fillX().row();
        mainTable.add(category("Word solving wizard", false, false, false)).expandX().fillX().row();

        stage.addActor(scrollPane);
    }

    public Table category(String title, boolean bronze, boolean silver, boolean gold)
    {
        Table table = new Table();

        //Add catagory title in a new label
        Table titleTable = new Table();
        Label titleLabel = new Label(title, skin);
        titleTable.add(titleLabel).expandX().fill();

        table.add(titleTable).expandX().fillX().row();

        //Add content in new Label
        Table contentTable = new Table();
        Label bronzeLabel = new Label("Locked", skin);
        Label silverLabel = new Label("Locked", skin);
        Label goldLabel = new Label("Locked", skin);

        if (bronze) bronzeLabel.setText("Bronze");
        if (silver) silverLabel.setText("Silver");
        if (gold) goldLabel.setText("gold");

        contentTable.add(bronzeLabel).pad(10);
        contentTable.add(silverLabel).pad(10);
        contentTable.add(goldLabel).pad(10);

        contentTable.row();

        Label objectiveLabel = new Label("Objective: do something that has to do with " + title, skin);
        contentTable.add(objectiveLabel).pad(10).colspan(3).row();

        Label rewardLabel = new Label("Reward: gain awesome stuff by doing " + title, skin);
        contentTable.add(rewardLabel).pad(10).colspan(3).row();

        table.add(contentTable).expandX().fillX();

        return table;
    }