message: Truncate article names in the sidebar
diff: "Categories": [
  {
  "Name": "overview",
  - "Title": "SurveyJS Form Library Overview"
  + "Title": "Overview"
  },
  {
  "Name": "get-started",
  - "Title": "Get Started with SurveyJS",
  + "Title": "Get Started",
  "Items": [
  {
  "Name": "get-started-angular",
  