a/bindings: Add WinMR system buttons
Currently there does not seem to be a way to access the SteamVR
dashboard with the Reverb G2 (controllers).
This adds a binding that allows to use the system/home button to
open the SteamVR dashboard.
Remark: In the OpenXR 1.0 spec there is no binding for
/input/system in XR_EXT_hp_mixed_reality_controller. However on Windows
this button would supposedly allow to (indirectly?) access the
SteamVR dashboard. (Which I can't confirm myself, as I don't have
access to a Windows OS right now.) To properly support system buttons in
OpenXR introduce XR_MNDX_system_buttons.
Co-authored-by: Jakob Bornecrantz <jakob@collabora.com>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>
authored by