Log Message:
xfce4-clipman-plugin: update to 1.4.4

Change log:

1.4.4
======
- settings: Improve layout
- settings: Drop some GtkStock items
- Update support URLs from goodies to docs.xfce.org (Bug #16141)
- Drop deprecated Gtk style properties
- Also show desktop file in Cinnamon (Bug #14058)
- Fix getting modifier in gsd-clipboard-manager (Bug #14642)
- Fix typo
- Translation Updates:
  Albanian, Armenian (Armenia), Belarusian, Catalan, Chinese (China),
  Czech, Danish, Finnish, French, Galician, Hebrew, Icelandic, Italian,
  Kazakh, Norwegian Bokmål, Polish, Portuguese, Slovak, Slovenian,
  Spanish, Turkish, Ukrainian