cs_windows.py: Properly import CDesktopEnums (#10844)

A PyGIWarning would be thrown into the console for not specifying version. This ensures the right version of CDesktopEnums is loaded.

Author: JPeisach

files/usr/share/cinnamon/cinnamon-settings/modules/cs_windows.py

@@ -2,6 +2,7 @@
 
 import gi
 gi.require_version('Gtk', '3.0')
+gi.require_version('CDesktopEnums', '3.0')
 from gi.repository import Gio, Gtk, CDesktopEnums
 
 from SettingsWidgets import SidePage