private void EleGroup_EditClick(object sender, RoutedEventArgs e)
        {
            EventGroup eventGroup = (EventGroup)((FrameworkElement)sender).DataContext;
            EventGroupEditPageViewModel eventGroupViewModel = new EventGroupEditPageViewModel(eventGroup, viewModel.GetAllGroups());

            Frame.Navigate(typeof(EventGroupEditPage), eventGroupViewModel);
        }
        private void IbnAddGroup_Click(object sender, RoutedEventArgs e)
        {
            EventGroup eventGroup = new EventGroup();
            EventGroupEditPageViewModel eventGroupViewModel = new EventGroupEditPageViewModel(eventGroup, viewModel.GetAllGroups());

            viewModel.Settings.Groups.Collection.Add(eventGroup);

            Frame.Navigate(typeof(EventGroupEditPage), eventGroupViewModel);
        }