private void DodajNoviToolStripMenuItem_Click(object sender, EventArgs e)
{
frmModelDetalji form = new frmModelDetalji();
form.Show();
}
private void NoviModelToolStripMenuItem_Click(object sender, EventArgs e)
{
frmModelDetalji forma = new frmModelDetalji(null, _modeli);
forma.Show();
}