handle case where d[0].ms=0 in legend
handle case where d[0].ms=0 in legend

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