Fix reverse mouse drag missing function bug
Fix reverse mouse drag missing function bug

mkungla/aframe,chenzlabs/aframe,dmarcos/aframe,dmarcos/aframe,ngokevin/aframe,mkungla/aframe,ngokevin/aframe,aframevr/aframe,aframevr/aframe,chenzlabs/aframe,RSpace/aframe,RSpace/aframe