turn on traces popover and make it not crash
turn on traces popover and make it not crash

allowed scatter3d to generate scatter (2d) keys in calcdata,
which is needed for styling popover items, at least until we do
a major refactor there.

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