reduce segments for a-cursor default (fixes #2821)
reduce segments for a-cursor default (fixes #2821)

wizgrav/aframe,ngokevin/aframe,jaxmolina/ar,mkungla/aframe,jaxmolina/ar,RSpace/aframe,weddingdj/aframe,aframevr/aframe,RSpace/aframe,chenzlabs/aframe,ngokevin/aframe,dmarcos/aframe,chenzlabs/aframe,darkwing/aframe,googlecreativelab/aframe,darkwing/aframe,googlecreativelab/aframe,wizgrav/aframe,aframevr/aframe,mkungla/aframe,weddingdj/aframe,dmarcos/aframe