Fix get-content-from-element

src/main/cljs/dda/c4k_common/browser.cljs

@@ -28,10 +28,9 @@
   (let [content (-> (get-element-by-id name)
                     (.-value))]
     (cond
-      (and optional (some? deserializer))
-      (when-not (st/blank? content)
-        (apply deserializer [content]))
-      (and (false? optional) (some? deserializer))
+      (and optional (st/blank? content))
+      nil
+      (some? deserializer)
       (apply deserializer [content])
       :else
       content)))