Add helm-ff-extension

lunarized-definitions.el

@@ -626,7 +626,8 @@ the \"Gen RGB\" column in lunarized-definitions.el to improve them further."
                 (helm-ff-directory (,@bg-back ,@fg-blue))
                 (helm-ff-executable (,@fmt-bold ,@fg-green))
                 (helm-ff-file (:inherit default))
-                (helm-ff-invalid-symlink (,@bg-base02 ,@fg-red))
+                (helm-ff-file-extension (,@fg-yellow))
+                (helm-ff-invalid-symlink (,@fg-magenta))
                 (helm-ff-prefix (,@fmt-revr ,@fg-yellow))
                 (helm-ff-symlink (,@fmt-bold ,@fg-cyan))
                 (helm-gentoo-match (:inherit helm-match))