message: fix bottom placement rotate
diff: @@ -116,11 +116,14 @@ function getTranslateFromPlacement(placement: Placement) {
  deg = 90;
  translate[1] = -14;
  break;
  - case 'top':
  case 'bottom':
  deg = 0;
  translate[1] = -8;
  break;
  + case 'top':
  + deg = 180;
  + translate[1] = -8;
  + break;
  }
  return {
  