unified hoverlabel: title font should be the same as fullLayout.font
unified hoverlabel: title font should be the same as fullLayout.font

plotly/plotly.js,etpinard/plotly.js,etpinard/plotly.js,plotly/plotly.js,etpinard/plotly.js,aburato/plotly.js,plotly/plotly.js,aburato/plotly.js,plotly/plotly.js