message: fix width of timestamp band despite nav panel expansion
diff: font-family: 'sans';
  overflow-y: scroll;
  padding: 1rem 1rem 3rem;
  - background: linear-gradient(to right, #fff, #fff 0%, #fff 80%, #eee 20%);
  + background: linear-gradient(to left, rgba(245, 245, 245, 1) 185px, #fff 185px, #fff 100%);
  }
  ol {
  