Improve initialState loading

app/assets/javascripts/components/actions/store.jsx

@@ -0,0 +1,17 @@
+import Immutable from 'immutable';
+
+export const STORE_HYDRATE = 'STORE_HYDRATE';
+
+const convertState = rawState =>
+  Immutable.fromJS(rawState, (k, v) =>
+    Immutable.Iterable.isIndexed(v) ? v.toList() : v.toMap().mapKeys(x =>
+      Number.isNaN(x * 1) ? x : x * 1));
+
+export function hydrateStore(rawState) {
+  const state = convertState(rawState);
+
+  return {
+    type: STORE_HYDRATE,
+    state
+  };
+};