Zapis predmetov

z #5 zatial pridavanie a mazanie zapisnych listov
Pouzivaj cely cas app.d. "Oficialne" by si mal vediet interagovat iba s vrchnym dialogom, ale aisikl to az tak podrobne neemuluje...
Hmm, mozno by sme mali zmenit open_dialog() a spol, aby tie dialogy realne nevracali.