public async void RefreshList()
{
IsRefreshing = true;
HockeyApp.MetricsManager.TrackEvent("Cards List Refreshed");
await _azure.UpdateAllCards(_auth.CurrentUser);
var ret = await _azure.GetAllCards(_auth.CurrentUser.UserID);
CardsList = null;
CardsList = new ObservableCollection <Card>(ret);
IsRefreshing = false;
}