Log Message:
xfce4-taskmanager: update to 1.5.6

Change log:

1.5.6 (2023-10-02)
=====
- Update copyright year
- Rounded legend icons
- Reopen process window maximized when closed maximized
- Properly finalize global objects in main
- Add missing include
- Fix more memory leaks
- Fix memory leak
- Fix CSS related deprecation warnings
- Ignore GtkStatusIcon related deprecations
- Make libx11 optional, guard x11 code paths
- Change type so that memory values are correct (Fixes #65)
- settings-dialog: Fix untranslated label
- Add icons at missing sizes, clean up SVG metadata
- Add minimal support for Wayland
- Fix graph drop off on the right side
- Change graph peak variable to double
- Remove timeout before exiting main loop
- build: Add GLib requirement
- Do not treat missing swap as error on OpenBSD and NetBSD
- Fix process filter crash caused by the use of an uninitialized
variable
- Translation Updates:
  Albanian, Arabic, Armenian (Armenia), Asturian, Azerbaijani, Basque,
  Belarusian, 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,
  Lithuanian, Malay, Norwegian Bokmål, Occitan (post 1500), Persian
  (Iran), Polish, Portuguese, Portuguese (Brazil), Russian, Serbian,
  Slovak, Spanish, Swedish, Telugu, Thai, Turkish, Ukrainian, Uyghur