message: fix: improve button styles
diff: .btn-refresh,
  .btn-export {
  - width: 115px;
  + width: 160px;
  }
  .btn-icon {
  - font-size: 1.5rem;
  + font-size: 1.6rem;
  vertical-align: middle;
  - padding-bottom: 5px;
  + padding-right: 5px;
  + padding-bottom: 7px;
  }
  