private void Sort()
{
_downloadSignatureListView.Items.SortDescriptions.Clear();
_downloadSignatureListView.Items.SortDescriptions.Add(new SortDescription(null, ListSortDirection.Ascending));
_uploadLinkListView.Items.SortDescriptions.Clear();
_uploadLinkListView.Items.SortDescriptions.Add(new SortDescription("Signature", ListSortDirection.Ascending));
_uploadTrustSignatureListView.Items.SortDescriptions.Clear();
_uploadTrustSignatureListView.Items.SortDescriptions.Add(new SortDescription(null, ListSortDirection.Ascending));
}