message: actually center the icon
diff: @@ -69,6 +69,6 @@ limitations under the License.
  right: 0;
  mask: url('$(res)/img/icon-jump-to-bottom.svg');
  mask-repeat: no-repeat;
  - mask-position: 9px 14px;
  + mask-position: center;
  background: $muted-fg-color;
  }
  