public EntryDetailsViewModel(INavigationService navigation)
        {
            DisplayName = "Details";

            _cmds = new AppBarCommandViewModel[]
            {
                new OpenUrlExternalCommand(this),
                new OpenUrlIntervalCommand(navigation, this),
            };
        }
        public EntryNotesViewModel()
        {
            _fontSize = 15;
            DisplayName = "Notes";

            _cmds = new AppBarCommandViewModel[]
            {
                new IncreaseFontSizeCommand(this),
                new DecreaseFontSizeCommand(this),
            };
        }