gnu: thunar: Revert to 4.16.8 (from 4.17.x development series).

Partly reverts 39cee0f817.
Reported by Michael Rohleder <mike@rohleder.de>.

* gnu/packages/xfce.scm (thunar): Revert to 4.16.8.

gnu/packages/xfce.scm

@@ -782,7 +782,7 @@ like appearance, display, keyboard and mouse settings.")
 (define-public thunar
   (package
     (name "thunar")
-    (version "4.17.1")
+    (version "4.16.8")                            ;stable version = even minor
     (source (origin
               (method url-fetch)
               (uri (string-append "https://archive.xfce.org/src/xfce/"
@@ -790,7 +790,7 @@ like appearance, display, keyboard and mouse settings.")
                                   "thunar-" version ".tar.bz2"))
               (sha256
                (base32
-                "0w957z22asd7dgchib99013csr628pvakagsqg38w6zhsmb9dy9k"))))
+                "159ircj0mahx54fqsr3l3ynk690zlpc6ar5pnyhhpk90s8la5303"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)