Allow Datapoints to be displayed in the grid or details without additional code.

                'currentPowerSupply':  {'label': 'Current Power Supply',
                                        'datapoint': 'currentPowerSupply_currentPowerSupply',
                                        'cached': True
                                       },


                'currentPowerSupply':  {'label': 'Current Power Supply',
                                        'datapoint': 'currentPowerSupply_currentPowerSupply',
                                        'cached': False
                                       },
I think cached would be clearer if it was called datapoint_cached instead. I also think it should default to True.