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

fix issue with pen not drawing until second primary_grab; fix spawn_pen-hover icon; enable spawning pen from in-world-hud; re-enable personal space bubble as default

add ability to spawn pen from hud (replacing the space bubble toggle); disable space-bubble as default

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

allow changing color and scale via mouse when holding alt or shift keys; fixing/changing input for rift.