Log Message:
xfce4-clipman-plugin: update to 1.6.4

Change log:

1.6.4 (2023-07-31)
=====
- history-dialog: Fix memory leak
- history-dialog: Keep paste-on-activate in sync with the settings
- history-dialog: Remove useless creation/destruction of menu
- Simplify main app creation
- history-dialog: Better fit with the way GApplication works
- settings: Remove wrong signal handler
- settings: Better fit with the way GApplication works
- popup-clipman: Enable translations
- popup-clipman: Properly use GApplication
- Move default clipboard restoration from manager to collector
- gsd-clipboard: Add missing sanity check
- Remove dead code
- menu: Add some icons
- history: Clear history when it's disabled
- menu: Shift entries in reverse order
- Revert "Enable reverse-order option"
- menu: Improve management of clear history entries
- menu: Improve management of primary clipboard entry
- history: Refactor item_to_restore into image_to_restore
- settings: Align paste-on-activate combo like other widgets
- collector: Properly sync primary clipboard when default is empty
- collector: Fix primary timeout management
- collector: Remove unused function
- Make 'add-primary-clipboard' management internal to the collector
- Make 'add-primary-clipboard' imply 'persistent-primary-clipboard'
- settings: Fix 'skip-action-on-key-down' sync and improve strings
- collector: Make actions work again for selections
- collector: Fix memory leak
- collector: Properly disconnect signal handlers
- gsd-clipboard: Properly reset source id
- menu: Fix crash when selecting QR code
- Remove XfcePluggable from settings desktop file
- build: tests: Fix compiler warnings
- Translation Updates:
  Albanian, Armenian (Armenia), Basque, Belarusian, Bulgarian, Catalan,
  Chinese (China), 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), Polish, Portuguese, Portuguese (Brazil), Russian, Serbian,
  Slovak, Slovenian, Spanish, Swedish, Thai, Turkish, Ukrainian