Reports not restored after quitting and re-opening the app

[marcwie]

I really like the report function of the app that is displayed after every session. However, if one accidentally quits the app during the day all the statistics are reset to zero after re-opening. It would be nice if the previous reports would be recovered instead. Alternatively one could display a warning dialog (with a corresponding "okay" or "cancel" button) on quit to inform the user that all reports will be lost.