2.21.90:
* Fix GTK+-only build wrt. the tracker plugin and the startup-notification
* Fix building with newer versions of Vala
* Make the icon bigger when the launcher is dropped on the desktop
* Ignore backup files when adding them to the playlist
* Only put Totem on top when playing audio
* Install the Nautilus extension in the correct directory
* Browser plugin:
  - Reduce the number of times the button glows in the browser plugin
  - Handle application/x-ogg mimetype