short-circuit title draw if there's no title
short-circuit title draw if there's no title

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