code: def get_help_html(message=None):
      
  
      html = html_help_header()
  
      if message is None:
          message = dock_help()
  
      html += message.to_html()
      html += html_footer()
      return html
docs: Create the HTML content for the help dialog  or for external browser
  
      :param message: An optional message object to display in the dialog.
      :type message: Message.Message
  
      :return: the help HTML content
      :rtype: str