No tracking: Could not send raw mode to WM0 (-1)

[Peaj]

Describe the bug
Tracking does not work with Vive Tracker and Lighthouse v2.
It does work correctly with the same tracker and Lighthouse v1 though.

The pull request #302 fixes this issue for me.

Data
Info: Adding tracked object WM0 from HTC
Info: All enumerated devices attached.
Info: Loaded drivers: GlobalSceneSolver, HTCVive
Info: Device WM0 has watchman FW version 1541806442 and FPGA version 531/7/2; named 'RUNNER-WATCHMAN$runner-watchman'. Hardware id 0x84020006 Board rev: 3 (len 65)
Info: Detected LH gen 2 system.
Warning: Could not send raw mode to WM0 (-1)

Hardware setup
Vive Tracker
1-3 Lighthouse v2

Desktop (please complete the following information):

• OS: Windows
• Version Latest (4fb6d88)