Thumper Maintenance Update (VR issues)

The latest update fixes a few issues related to VR mode (both Steam VR and Oculus)

• Fixed re-centering VR position and orientation (hold ESC key OR start/pause button)
  
• Fixed pausing via keyboard (ESC key) in VR mode
  
• Playing in VR mode no longer requires the Thumper desktop window to be focused. This was causing issues where the game appeared to hang when launching into VR mode.