private void saveFilteredToolStripMenuItem_Click(object sender, EventArgs e)
{
List<ItemProto> Prots = new List<ItemProto>();
foreach (ItemProto Prot in lstProtos.FilteredObjects) Prots.Add(Prot);
if (Prots.Count > 0)
SaveProtos(Prots);
else
Message.Show("No items in filtered list.", MessageBoxButtons.OK, MessageBoxIcon.Error);
}