Add AmsifySuggestags settings

With 'whiteList' to true, only can add tags related with suggestions.
Update 'keepLastOnHoverTag' and 'checkSimilar' to improve usability.

app/assets/javascripts/sdg/related_list_selector.js

@@ -7,6 +7,9 @@
 
         amsify_suggestags._settings({
           suggestions: $(".sdg-related-list-selector .input").data("suggestions-list"),
+          whiteList: true,
+          keepLastOnHoverTag: false,
+          checkSimilar: false
         });
         amsify_suggestags.classes.focus = ".sdg-related-list-focus";
         amsify_suggestags.classes.sTagsInput = ".sdg-related-list-selector-input";

spec/system/sdg_management/relations_spec.rb

@@ -278,5 +278,14 @@ describe "SDG Relations", :js do
         expect(page).to have_css "td", exact_text: "1.1"
       end
     end
+
+    scenario "allows adding only white list suggestions" do
+      process = create(:legislation_process, title: "SDG process")
+
+      visit sdg_management_edit_legislation_process_path(process)
+
+      fill_in "Sustainable Development Goals and Targets", with: "tag nonexistent,"
+      within(".amsify-suggestags-input-area") { expect(page).not_to have_content "tag nonexistent" }
+    end
   end
 end