public void InitializeBeforeShowingTheWindow()
        {
            // if necessary, add references of main window to view models that
            // contain dialogs, so they could have parent window
            var notes = mainRepository.LoadNotes().Select(n => n.FromDisk()).ToList();

            centralPanelVM.InitializeNotes(notes);
            var counterValue = dailyTimeCalculation.CalculateTimeForToday(notes);

            totalCounterVM.InitCounter(counterValue);
        }