xfce4-mousepad: update to 0.6.1

Change log:

0.6.1 (2023-05-13)
=====
- I18n: Update po/LINGUAS list
- I18n: Update po/LINGUAS list
- build: Optionally require polkit
- build: Use m4_defined min versions and cleanup
- build: Use XDT_VERSION_INIT and get rid of configure.ac.in
- build: Switch from intltool to gettext
- menubar: Improve some strings
- search: Use consistent naming
- history: Properly restore multi-window session
- Restore opening mode only when it was overridden from the command line
- Add "X of Y matches" to search bar and replace dialog (Closes #174)
- Add application/x-zerosize to supported mime types (Fixes #194)
- Apply opening mode also to the open dialog (Fixes #181)
- Properly reconnect signal handler when auto-reload is enabled
- Translation Updates:
  Albanian, Arabic, 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 Bokm奪l, Occitan (post
  1500), Persian (Iran), Polish, Portuguese, Portuguese (Brazil),
  Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish,
  Telugu, Thai, Turkish, Ukrainian, Uyghur


(gutteridge)