Removing isLegendShown function
Merge branch 'master' into feature/#2151
Closes #2151. Adds legend to visualizations by default. Default legend values for charts with 1 series is the y axis label. Turning off the legend in Discover.
Merge branch 'master' into feature/#2151
Merge pull request #2456 from stormpython/feature/#2151

Add Legend by Default