This reverts commit 7d257c35.

This reverts commit 5c7e8673, reversing
changes made to 0814f7a1.

fix issue where scroll-scaling wasn't updating its local scale value; fix issue where media-loader wasn't setting the bounding box corrrectly in certain cases

fix bug where joystick input in rift would drop objects; fix bug where media loader objects loaded for the first time lose their physics shape

various updates to support moving the duck and pen into the gltf-component data of the environments instead of hubs.html and getting rid of interactable-template again