private void Sort()
{
_trustSignatureListView.Items.SortDescriptions.Clear();
_trustSignatureListView.Items.SortDescriptions.Add(new SortDescription(null, ListSortDirection.Ascending));
_untrustSignatureListView.Items.SortDescriptions.Clear();
_untrustSignatureListView.Items.SortDescriptions.Add(new SortDescription(null, ListSortDirection.Ascending));
}