guard against non-numeric and negative textsize in drawing routine
guard against non-numeric and negative textsize in drawing routine

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