Only use the amount of memory needed in sharedbuffergeometry based on networked-drawing configuration. Only create a sharedbuffergeometry object when a pen is first spawned.
Also, reduce the amount of memory used by primitive entities (cursor, spawned pens, teleport-controls)

fix bug that occur because clients were assuming mutual dataChannel connections when that is not always true (client B can't assume it can message client A even if it has received a message from client A already)

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.