Add test case for ensuring clearance of the parcoords line layer once there's no renderable panel
Add test case for ensuring clearance of the parcoords line layer once there's no renderable panel

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