message: Fix the bug, clearValue doesn't work correctly if it is called before restful choices are loaded:
diff: @@ -73,7 +73,7 @@ export class QuestionSelectBase extends Question {
  }
  }
  protected setNewValue(newValue: any) {
  - if (newValue) this.cachedValueForUrlRequests = newValue;
  + this.cachedValueForUrlRequests = newValue;
  super.setNewValue(newValue);
  }
  protected valueFromData(val: any): any {
  