Feature/249 optimization results are plotted incorrectly

https://trello.com/c/n4gQqkjm/249-optimization-results-are-plotted-incorrectly

Currently the legend below the title is not rendered, because it contains duplication. According to @cliffckerr the legends will be fixed with this PR https://github.com/StarterSquad/Optima/pull/129. Nevertheless the graph renders fine.