[grid] improvement

* modifie UI for 'thumbnail' images
* added 'Tags'('Select Tags') for file
* show tags for tagged files

frontend/src/components/dir-view-mode/dir-grid-view.js

@@ -79,6 +79,7 @@ class DirGridView extends React.Component {
           isDirentDetailShow={this.props.isDirentDetailShow}
           onItemRename={this.props.onItemRename}
           onAddFolder={this.props.onAddFolder}
+          onFileTagChanged={this.props.onFileTagChanged}
         />
       </Fragment>
     );