message: Tweak placeholder size
diff: .empty {
  width: var(--item-size);
  - height: calc(var(--item-size) + #{$badge-height} - #{3 * $item-border-width});
  + height: calc(var(--item-size) + #{$badge-height} - #{$item-border-width});
  border: 1px solid #ddd;
  }
  