4.17.2

- xfce-about: Fix potential NULL pointer access
- Introduce a shortcuts editor widget
- Translation Updates:
  Albanian, Amharic, Arabic, Armenian, Armenian (Armenia), Basque,
  Belarusian, Bengali, Bulgarian, Catalan, Chinese (China), Chinese
  (Hong Kong), Chinese (Taiwan), Croatian, Czech, Danish, Dutch,
  Eastern Armenian, English (Australia), English (United Kingdom),
  Estonian, Finnish, French, Galician, German, Greek, Hebrew,
  Hungarian, Icelandic, Indonesian, Interlingue, Italian, Japanese,
  Kazakh, Korean, Latvian, Lithuanian, Malay, Norwegian Bokmål,
  Norwegian Nynorsk, Occitan (post 1500), Polish, Portuguese,
  Portuguese (Brazil), Romanian, Russian, Serbian, Slovak, Slovenian,
  Spanish, Swedish, Telugu, Thai, Turkish, Ukrainian, Uyghur, Welsh