- Improve auto-maximize fn to maximize windows which size is equal to

  the available size.
- Restore original window size after untiling (Bug 8765).
- Add improved tab-win dialog.
- Translation updates: Asturian, Bulgarian, Czech, German, English
  (Australia), Spanish (Castilian), French, Croatian, Indonesian,
  Icelandic, Italian, Japanese, Kazakh, Korean, Malay, Norwegian
  Bokmal, Dutch (Flemish), Occitan (post 1500), Polish, Portuguese,
  Portuguese (Brazilian), Russian, Serbian, Swedish, Thai, Turkish,
  Ukrainian, Chinese (China), Chinese (Hong Kong), Chinese (Taiwan)