don't try to edit x,y,z positions for 3D annotations
don't try to edit x,y,z positions for 3D annotations

- as this problem is ill-defined,
  mouse xy -> scene xyz as infinity-many solutions.
- N.B. editing arrow tail position (i.e. ax, ay) and annotation
  text works!

etpinard/plotly.js,plotly/plotly.js,aburato/plotly.js,plotly/plotly.js,plotly/plotly.js,asolagmbh/plotly.js,plotly/plotly.js,iongroup/plotly.js,iongroup/plotly.js,aburato/plotly.js,asolagmbh/plotly.js,etpinard/plotly.js,asolagmbh/plotly.js,etpinard/plotly.js,iongroup/plotly.js