message: change regular expression of item name validation
diff: },
  {
  "name":"nameContainLettersNumbersDashes",
  - "pattern" : "^((?!\\d)[a-zA-Z0-9_-]+)$"
  + "pattern" : "^((?!\\d)[a-zA-Z0-9\\s_-]+)$"
  }],
  "reservedNames" : [],
  "validateEmptyNames": true,
  