fine tune annotation arrow selector
fine tune annotation arrow selector

- instead of looking through the whole graph div

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