Something Wrong with Multiple Joysticks Like Logitech X56

#### Issue details
I'm trying to use Logitech X56 and Thrustmaster Rudder Pedal as joysticks on MissionPlanner for remote manual control, but I'm not able to calibrate the three joysticks together. This may take 3 USB cables on the laptop, so the MP recognizes them as three different sets of joysticks. So I'm only able to calibrate roll and pitch with X56 Stick, throttle with X56 Throttle, and yaw with Rudder Pedal. But it's not possible for united calibration, let alone united manual control.

#### Version
MissionPlanner 1.3.56

#### Platform
[ ] All
[ ] AntennaTracker
[√] Copter
[√] Plane
[ ] Rover
[ ] Sub

#### Airframe type
hex and plane

#### Hardware type
Pixhawk 2.1

#### Logs
No log.

No source file, test, or entry point is named. Begin by reproducing the issue with Mission Planner 1.3.56, a Logitech X56, and Thrustmaster Rudder Pedal, then verify whether the three USB devices are detected as separate joystick sets. Done means unified calibration and manual control across roll, pitch, throttle, and yaw.

Written by the indexing model from the issue text.