add some missing style prefs

Author: darwin

src/lib/devtools/prefs.cljs

@@ -31,6 +31,8 @@
    :circular-reference-wrapper-style ""
    :surrogate-key                    "$$this-is-cljs-devtools-surrogate"
    :circular-reference-symbol-style  (symbol-style "#f88")
+   :fn-header-style                  ""
+   :fn-prefix-style                  ""
    :fn-symbol                        "fn"
    :fn-symbol-style                  (symbol-style "#282")
    :fn-ns-symbol                     "in"
@@ -160,4 +162,4 @@
 
 (defn update-pref! [key f & args]
   (let [new-val (apply f (pref key) args)]
-    (set-pref! key new-val)))
+    (set-pref! key new-val)))