rewrote theme handling

config.org

@@ -342,12 +342,10 @@ Restore it to reasonable value after init. Also stop garbage collection during m
 Windows Theme:
 #+BEGIN_SRC emacs-lisp
 (when *sys/windows*
-  (dolist (theme custom-enabled-themes)
-    (disable-theme theme))
+  (mapcar #'disable-theme custom-enabled-themes)
   (load-theme 'tango))
 (when *sys/linux*
-  (dolist (theme custom-enabled-themes)
-    (disable-theme theme))
+  (mapcar #'disable-theme custom-enabled-themes)
   (load-theme 'plastic))
 #+END_SRC