PXR_ManagerEditor doesn't play nice if you don't use XROrigin #25
Description
All of my projects use external interaction systems (non-unity), due to ease of use and due to lack of interaction features from Unity. I've used these packages for years, and it's become a core part of my workflow. These packages are also pretty popular among VR devs from what I can tell. (UltimateXR, HurricaneVR, VRIF as examples). Some of these don't rely on the built-in Unity systems based on XROrigin or the XRInteractionManagers. They have their own custom setups. I feel like I need to stress that for myself and at least 2 other companies that I know of, this has been standard practice for 8 or 9 years now.
I updated to the most recent version of this package (PICO-Unity-Integration-SDK), and now the PXR_ManagerEditor script gives me a null-reference exception every time my mouse moves over the inspector. It's looking for an XROrigin that doesn't exist. It does this every frame. If I make a build, everything seems to run fine and I get no errors, which suggests to me that it's truly only an editor issue.
