message: FIx the build, notify knockout about chaning in checkbox item,
diff: @@ -50,6 +50,7 @@ export class QuestionCheckbox extends QuestionCheckboxModel {
  this.isAllSelectedUpdating = false;
  }
  getItemClass(item) {
  + var val = this["koValue"](); //trigger dependencies from koValue for knockout
  var isChecked = this.isItemSelected(item);
  var itemClass =
  this.cssClasses.item +
  