STUFF.

* Moved config to it's own dialog, under Tools Menus.
* Detects, color codes and warns conflicting shortcuts.
* Added supports for a few of the shortcuts with no ID.
* Fixed the configuration dialog search.
* Prevent the extension from mapping unknown non-US keys to shortcuts
(tildes, accents, etc.)
* Added Private-Browsing support (although, to make sure we don't write
to disk during Private Browsing, the Tools menu will only display the
addon on non-Private windows)
* Added work-around for bug 78414.
* Added work-around for bug 406199.
* The extension should now be localizable.
* Among other things.