add 0 scaled other axes so vive controller navigation works

Config/DefaultInput.ini

@@ -142,6 +142,8 @@ DoubleClickTime=0.200000
 +AxisMappings=(AxisName="MoveForward",Scale=1.000000,Key=MixedReality_Right_Thumbstick_Y)
 +AxisMappings=(AxisName="MoveForward",Scale=1.000000,Key=nDisplayAnalog1)
 +AxisMappings=(AxisName="MoveRight",Scale=1.000000,Key=nDisplayAnalog0)
++AxisMappings=(AxisName="MoveForward",Scale=0.000000,Key=Vive_Right_Trackpad_X)
++AxisMappings=(AxisName="MoveRight",Scale=0.000000,Key=Vive_Right_Trackpad_Y)
 DefaultPlayerInputClass=/Script/Engine.PlayerInput
 DefaultInputComponentClass=/Script/Engine.InputComponent
 DefaultTouchInterface=/Engine/MobileResources/HUD/DefaultVirtualJoysticks.DefaultVirtualJoysticks