add gl2d replot-from-blank-graph test case
add gl2d replot-from-blank-graph test case

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