private void button1_Click(object sender, EventArgs e)
        {
            //dodajFizicko
            ProdavacInfo p = new ProdavacInfo(this, true);

            p.ShowDialog();
            ucitajFizicka();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            //izmeniFizicko
            if (listView1.SelectedItems.Count == 0)
            {
                MessageBox.Show("Odaberite prodavca klikom na njegov ID!");
                return;
            }
            rbr_prodavca = listView1.SelectedItems[0].Index;
            ProdavacInfo p = new ProdavacInfo(this, false);

            p.ShowDialog();
            ucitajFizicka();
        }