message: fix: use autocomplete off when labelForId is used
  closes
diff: <div class="ng-input">
  <input #filterInput
  type="text"
  - autocomplete="{{dropdownId}}"
  + [attr.autocomplete]="labelForId ? 'off' : dropdownId"
  [attr.id]="labelForId"
  [attr.tabindex]="tabIndex"
  [readOnly]="!searchable"
  