message: return back ranking keyboard changes (merge problem)
diff: @@ -261,20 +261,20 @@ export class QuestionRankingModel extends QuestionCheckboxModel {
  }
  private handleArrowUp = (index: number, choice: ItemValue) => {
  - const newValue = this.value.slice();
  - newValue.splice(index, 1);
  - newValue.splice(index - 1, 0, choice);
  - this.value = newValue;
  + const choices = this.rankingChoices;
  + choices.splice(index, 1);
  + choices.splice(index - 1, 0, choice);
  + this.setValue();
  setTimeout(() => {
  this.focusItem(index - 1);
  }, 1);
  };
  private handleArrowDown = (index: number, choice: ItemValue) => {
  - const newValue = this.value.slice();
  - newValue.splice(index, 1);
  - newValue.splice(index + 1, 0, choice);
  - this.value = newValue;
  + const choices = this.rankingChoices;
  + choices.splice(index, 1);
  + choices.splice(index + 1, 0, choice);
  + this.setValue();
  setTimeout(() => {
  this.focusItem(index + 1);
  }, 1);
  