use camera spec of own scene to init the camera,
use camera spec of own scene to init the camera,

 - this fixes an to this point undiscovered bug, where the
   camera position of non-first scenes in multi-scene
   wasn't set properly.

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