private void OnAddRecord(TrackedDayRecordViewModel recordViewModel)
{
var context = (UserViewModel)BindingContext;
TrackerService.AddRecord(Mapper.Map <TrackedDayRecordModel>(recordViewModel), context.SelectedDate);
var newContext = Mapper.Map <UserViewModel>(App.User);
newContext.SelectedDate = context.SelectedDate;
BindingContext = newContext;
}