rewrite Scene (part 1):
rewrite Scene (part 1):

- make Scene constructor only set properties (no async stuff)

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