MessageBox doesn't return the index of IsDefault button

[BDisp]

This test will fail:

    [Fact]
    [SetupFakeDriver]
    public void Button_IsDefault_True_Return_His_Index_On_Accepting ()
    {
        Application.Init ();

        Application.Iteration += (_, _) => Assert.True (Application.RaiseKeyDownEvent (Key.Enter));
        var res = MessageBox.Query ("hey", "IsDefault", "Yes", "No");

        Assert.Equal (0, res);

        Application.Shutdown ();
    }