Key入力の動き改善

- Searchに内容がある時にEscを押すと内容をSearchの内容を削除する
- Cmd + Fを押すとSearch inputがfocusされる

browser/main/HomePage/ArticleTopBar.js

@@ -1,13 +1,22 @@
 import React, { PropTypes } from 'react'
 import ReactDOM from 'react-dom'
 import ExternalLink from 'boost/components/ExternalLink'
-import { setSearchFilter } from 'boost/actions'
+import { setSearchFilter, clearSearch } from 'boost/actions'
 
 export default class ArticleTopBar extends React.Component {
   isInputFocused () {
     return document.activeElement === ReactDOM.findDOMNode(this.refs.searchInput)
   }
 
+  escape () {
+    let { status, dispatch } = this.props
+    if (status.search.length > 0) {
+      dispatch(clearSearch())
+      return
+    }
+    this.blurInput()
+  }
+
   focusInput () {
     ReactDOM.findDOMNode(this.refs.searchInput).focus()
   }