new feature: filter tags and folder list

browser/main/SideNav/SearchButton.js

@@ -0,0 +1,22 @@
+import PropTypes from 'prop-types'
+import React from 'react'
+import CSSModules from 'browser/lib/CSSModules'
+import styles from './SearchButton.styl'
+import i18n from 'browser/lib/i18n'
+
+const SearchButton = ({ onClick, isActive }) => (
+  <button styleName='top-menu-search' onClick={(e) => onClick(e)}>
+    <img
+      styleName='icon-search'
+      src={isActive ? '../resources/icon/icon-search-active.svg' : '../resources/icon/icon-search.svg'}
+    />
+    <span styleName='tooltip'>{i18n.__('Search')}</span>
+  </button>
+)
+
+SearchButton.propTypes = {
+  onClick: PropTypes.func.isRequired,
+  isActive: PropTypes.bool
+}
+
+export default CSSModules(SearchButton, styles)