Patch for Vive Trackers support

[YuriNK]

@AverInv

@YuriNK, I can’t seem to get the Output Pin of the Vive Tracker (pin 1) to register any haptic events from Unreal. I also tried Force Feedback and that didn’t work either. The pin seemed to just sit at 0 volts when it should go up to 3.3v.

Any idea why that might be the case? Could you please help? =)

Input doesn’t work with SteamVR beta. You can disable betas in SteamVR properties in Steam.