v0.11.0

The daemon is unchanged from 0.10.0; all changes are in the GNOME Shell extension.

Changed

• Light and dark styling follows the GNOME Shell style variant via
  stylesheet-dark.css and stylesheet-light.css, loaded automatically by the
  Shell, instead of loading light.css into the theme context by hand. The
  manual theme setting and its preferences row are gone; the panel matches the
  shell.
• Signal connections use connectObject/disconnectObject.

Fixed

• disable() stops the daemon synchronously with SIGTERM instead of deferring
  the kill to a timeout.
• The daemon-restart timeout is cleared before a new one is scheduled.
• Removed the try/catch around send_signal, which does not throw.

Performance

• The thumbnail cache is cleared asynchronously in batches instead of a
  synchronous enumerate and delete on the compositor thread.
• The thumbnail path cache is pruned on delete and clear-all.
• Each row computes its type (image, URL, color) once.