private async Task OnSectionCreated(SectionCreated msg)
        {
            var notebooks = await _notebook.GetNotebooks();

            var selectedNotebook = Notebooks.Single(n => n.IsSelected);

            await DoOnUiDispatcherAsync(() =>
            {
                Notebooks.Clear();
                notebooks.ForEach(n =>
                {
                    if (n.Id == selectedNotebook.Id)
                    {
                        n.Select();
                    }
                    Notebooks.Add(n);
                });
            });
        }
        private async Task OnPageCreated(PageCreated msg)
        {
            var notebooks = await _notebook.GetNotebooks();

            var selectedSection = Sections.Single(s => s.IsSelected);

            var updatedParentNotebook = notebooks.Single(n => n.Id == selectedSection.ParentNotebook.Id);

            await DoOnUiDispatcherAsync(() =>
            {
                Sections.Clear();
                updatedParentNotebook.Sections.ForEach(s =>
                {
                    if (s.Id == selectedSection.Id)
                    {
                        s.Select();
                    }
                    Sections.Add(s);
                });
            });
        }