v0.57 Dashboard detection and warning

The Active keys label now has a warning state for when the SteamVR dashboard is visible, which blocks input for this application and will prevent assigned keys from being triggered. It will display Blocked with an explanatory tooltip.

Also fixed a few mistakes in the Oculus Touch bindings, I'm still not sure if these work tough as I've been contacted regarding Rift S not working with this application, and I don't have a Rift S to test with.