private void On_btnAddSurface_Click(object sender, EventArgs e)
        {
            var surfaceEditor = new SurfaceEditor();
            var dialogResult  = surfaceEditor.ShowDialog(this);

            if (dialogResult != DialogResult.OK)
            {
                return;
            }

            surfacesStore.Add(surfaceEditor.Surface);

            UpdateSurfacesListBox();
        }
        private void On_btnEditSurface_Click(object sender, EventArgs e)
        {
            var surfaceEditor = new SurfaceEditor((Surface)lbSurfaces.SelectedItem);

            surfaceEditor.ShowDialog(this);
        }