HighCharts: Line series disappears on click of legend

HighCharts: Line series disappears on click of legend

References

Reference NO 1

http://stackoverflow.com/questions/15197093/highcharts-line-series-disappears-on-click-of-legend

Reference NO 2

http://forum.highcharts.com/viewtopic.php?f=9&t=19989

Reference NO 3

https://github.com/highslide-software/highcharts.com/issues/906

Reference NO 4

http://questiontrack.com/highcharts-change-hover-style-in-line-chart-when-hovering-over-legend-1037854.html

Reference NO 5

https://highcharts.uservoice.com/

Reference NO 6

http://jsfiddle.net/P8bXB/4/

Reference NO 7

http://www.hows.info/questions/tagged/highcharts?page=45&sort=newest

Reference NO 8

http://webscripts.softpedia.com/scriptViewChangelog/Highcharts-JS-Changelog-68227.html