[dir view] for file items: added 'Properties' to its context menu, (#5581)

* [dir view] for file items: added 'Properties' to its context menu,
'more' dropdown menus in <tr> & the top toolbar

- click 'Properties', the 'info' panel will be shown

* [dir view] operation menu for file item: removed 'Comment', moved 'Properties'

frontend/src/components/toolbar/multiple-dir-operation-toolbar.js

@@ -220,6 +220,9 @@ class MultipleDirOperationToolbar extends React.Component {
       case 'Access Log':
         this.onAccessLog(dirent);
         break;
+      case 'Properties':
+        this.props.showDirentDetail('info');
+        break;
       case 'Open via Client':
         this.onOpenViaClient(dirent);
         break;