feat(styleguide): add modal in wrapper reducer

packages/component-faraday-ui/src/modals/OpenModal.js

-import React from 'react'
 import { get } from 'lodash'
 import { compose, withHandlers } from 'recompose'
 import { withModal } from 'pubsweet-component-modal/src/components'
 
 import { MultiAction } from './'
 
-const OpenModal = ({ onClickEvent, children }) => (
-  <div>{children(onClickEvent)}</div>
-)
+const OpenModal = ({ onClickEvent, children }) => children(onClickEvent)
 
 export default compose(
   withModal(() => ({

packages/component-faraday-ui/src/modals/OpenModal.md

 Open a confirmation modal by clicking on an element
 
 ```js
-const ActionLink = require('../ActionLink.js')
-
-;<OpenModal
+<OpenModal
   confirmAction={() => alert('Confirm')}
   title="Are you sure?"
   confirmText="Delete"

packages/styleguide/src/Wrapper.js

@@ -8,9 +8,18 @@ import { createStore, combineReducers } from 'redux'
 
 import withDragDropContext from './withDragDropContext'
 
+const modalReducer = (
+  state = {
+    error: null,
+    props: {},
+  },
+  action,
+) => state
+
 const store = createStore(
   combineReducers({
     form: reducer,
+    modal: modalReducer,
   }),
 )