move loading of custom.el to the beginning

settings/pre-settings.el

@@ -51,5 +51,11 @@ Both Win32 and Cygwin count.")
        (if (require 'dbus) (dbus-ping :session "org.freedesktop.Notifications")))  ;; is not enough
   "Check if DBus is available.")
 
+(use-package cus-edit
+  :config
+  (setq custom-file (concat user-emacs-directory "custom.el"))
+  (setq custom-buffer-done-kill t)
+  (load custom-file t t))
+
 (provide 'pre-settings)
 ;;; pre-settings.el ends here