improve itemclick / itemdoubleclick tests
improve itemclick / itemdoubleclick tests

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