private void BreakConnectionItem_Click(object sender, RoutedEventArgs e)
{
Console.WriteLine("Bye bye");
PanelConnection connection = (sender as MenuItem).Tag as PanelConnection;
connection.Delete();
Connections.Remove(connection);
Statement first = (connection.First as GStatement).GetBoundProperty() as Statement;
Statement second = (connection.Second as GStatement).GetBoundProperty() as Statement;
first.NextStatements.Remove(second);
}
