Fixed buttonless mode for some headsets

Natural Locomotion

Move naturally in virtual reality in any SteamVR game that supports trackpad/stick locomotion. More immersion, more comfort!

Last update introduced a bug where the buttonless mode didn't work with some headsets (calculated hip height was completely wrong). This patch fixes it. We have also added a note about Joycon support warning that off-brand (third party) Joycons are not tested and may not work at all.