private void HelpAbout_Click(object sender, RoutedEventArgs e)
{
helpWindow = new HelpWindow();
helpWindow.Show();
}
/// <summary>
/// Opens a window with the documentation of the project.
/// Is called by the corresponding menu item or by a keyboard shortcut.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="e">The event arguments.</param>
private void HelpToolStripMenuItem_Click(object sender, EventArgs e)
{
HelpWindow helpWindow = new HelpWindow();
helpWindow.Show();
}