Socket messaging improvements

[GwnDaan]

Small QOL improvement.

• Only sent system informations when there is a client connected.
• Makes UI more responsive by defaulting emit_pingback to True, so that the services status get sent back to the client immediate instead of waiting on the manager function:

    @socketio.on("get services status", namespace="/test")
  - def getServicesStatus(emit_pingback=False):
  + def getServicesStatus(emit_pingback=True):
        """
            Get the status of services listed in services_list
            (services_list is global)
  
  +        :param emit_pingback: whether or not the services status is sent to clients 
  +            (defaults to true as the socketio.on() should receive back the information)
  +        :return The gathered services status list
        """