Actualizar plugin Additionals a 3.0.0

plugins/additionals/app/helpers/additionals_chartjs_helper.rb

@@ -0,0 +1,12 @@
+module AdditionalsChartjsHelper
+  def chartjs_colorschemes_info_url
+    link_to(l(:label_chartjs_colorscheme_info),
+            'https://nagix.github.io/chartjs-plugin-colorschemes/colorchart.html',
+            class: 'external')
+  end
+
+  def select_options_for_chartjs_colorscheme(selected)
+    data = YAML.safe_load(ERB.new(IO.read(Rails.root.join('plugins/additionals/config/colorschemes.yml'))).result) || {}
+    grouped_options_for_select(data, selected)
+  end
+end