Hide the "Add new services" menu from Files app when running as dialog.

ui/file_manager/file_manager/foreground/js/file_manager.js

Index: ui/file_manager/file_manager/foreground/js/file_manager.js
diff --git a/ui/file_manager/file_manager/foreground/js/file_manager.js b/ui/file_manager/file_manager/foreground/js/file_manager.js
index 3d4aa7ea7518ec472eeb6479ae216e6964c7ccc1..9d3bf0fda4bfc6f6dcf8cf3c90c6a5828808f919 100644
--- a/ui/file_manager/file_manager/foreground/js/file_manager.js
+++ b/ui/file_manager/file_manager/foreground/js/file_manager.js
@@ -996,10 +996,11 @@ FileManager.prototype = /** @struct */ {
     directoryTree.dataModel = new NavigationListModel(
         assert(this.volumeManager_),
         assert(this.folderShortcutsModel_),
-        new NavigationModelMenuItem(
-            str('ADD_NEW_SERVICES_BUTTON_LABEL'),
-            '#add-new-services-menu',
-            'add-new-services'));
+        this.dialogType === DialogType.FULL_PAGE ?
+            new NavigationModelMenuItem(
+                str('ADD_NEW_SERVICES_BUTTON_LABEL'),
+                '#add-new-services-menu',
+                'add-new-services') : null);
 
     this.ui_.initDirectoryTree(directoryTree);
   };