private void contextMenuItemBrowse_Click(object sender, System.EventArgs e)
{
if (listTerms.SelectedItems == null) return;
ListViewItem selItem = listTerms.SelectedItems[0];
if (selItem == null) return;
string field = selItem.SubItems[2].Text.Trim().Substring(1, selItem.SubItems[2].Text.Trim().Length - 2);
string text = selItem.SubItems[3].Text;
if (field == null || text == null)
return;
Term t = new Term(field, text);
_luke.ShowTerm(t);
}