Lib view mode (#2975)

* [update dir layout]rewrite dir layout

* add file menu handler

* optimized code

* add file load error message for file component

* repair pencil bug

* delete unnecessary file

* reapir file-chooser bug

* add file uploader module

* rename component name

frontend/src/components/select-editor/select-editor.js

@@ -88,7 +88,7 @@ class SelectEditor extends React.Component {
             {this.props.isEditIconShow && (
               <span 
                 title={gettext('Edit')} 
-                className="fa fa-pencil attr-action-icon" 
+                className="fa fa-pencil-alt attr-action-icon" 
                 onClick={this.onEditPermission}>
               </span>
             )}