- Page Color menu: a third row of background art ending in Show All, which
  opens the template art gallery for any page; a rainbow Custom Color slot
  opens a hue, lightness and saturation picker.
- The sync status is always an icon, with its state as the tooltip.
- Folded toolbar groups hand their width back to the row, so trailing
  controls sit flush with the page frame.
- Empty tab-row space drags the window and double-click zooms it.
- Mac OS X 10.6: the unified gradient runs through the tab row to the
  notebook frame.

Assisted-by: claude-opus-5.5