Added functionality to AMControl so that moveRelative can be done either from the current feedback value (previous behavior) or from the setpoint. Added new enum to support this in AMControl and defaulted the argument in moveRelative call (so that old calls will continue to work as before). Used this functionality to improve the new scan action scan controller by calling during the scan action tree assembly process. Had to add a new boolean in AMMoveActionInfo3 to relay this information. Maybe the enum should be moved out of AMControl and to either AMControlInfo or some other definition location. Removed some unused code from SGMAppController.