/// <summary>
        /// Adds a new feed post list page.
        /// </summary>
        /// <param name="feed">Feed.</param>
        void AddFeedPostListPage(Feed feed)
        {
            var navigationPage = new FRNavigationPage(new PostListPage(new PostListViewModel(feed)))
            {
                Title = feed.ShortendTitle
            };

            if (Device.RuntimePlatform == Device.iOS)
            {
                navigationPage.Icon = "tab_about.png";
            }

            Children.Insert(0, navigationPage);
        }
        /// <summary>
        /// Adds the empty feed list page.
        /// </summary>
        void AddEmptyPage()
        {
            var contentPage = new EmptyPage
            {
                Title = "Welcome"
            };

            var navigationPage = new FRNavigationPage(contentPage)
            {
                Title = "Welcome"
            };

            if (Device.RuntimePlatform == Device.iOS)
            {
                navigationPage.Icon = "tab_about.png";
            }

            Children.Insert(0, navigationPage);
        }