- improved tabs appearance.

- fixed tooltips colors.

- added icon to the add-on.

- added blue shade to the navigation buttons when pressed (instead of the white shade).

- fixed unreadable text color on notifications in metadata editor and more windows.
- fixed light background-color in the xpi installer.

TODO:
- fix unreadable text color on some on some tooltips.

A slight change: the media bar and the left bar are now darker.

This version is compatible to the matching version of the original gonzo