refactored UI management - WEKIT-ECS/MIRAGE-XR GitHub Wiki

Views are launched via contentsteplistview and https://github.com/WEKIT-ECS/MIRAGE-XR/blob/fwild/2477-editpanels/Assets/MirageXR/Managers/AssetBundleManager/AssetBundleManager.cs

see here: https://github.com/WEKIT-ECS/MIRAGE-XR/pull/2487/files