message: fix(panel): fix sluggish scroll on Firefox
diff: flex: 1;
  overflow-x: hidden;
  overflow-y: scroll;
  - font-size: 0; // remove whitespace
  + // font-size: 0; // https://bugzilla.mozilla.org/show_bug.cgi?id=1573030
  -webkit-overflow-scrolling: touch;
  }
  