Add thumbnail property to User model for image handling

- Introduced a new 'thumbnail' property in the User model to enable thumbnail support for image rendering.
- This enhancement improves the visual representation of user-related images in the application.

src/database/models/User.js

@@ -116,6 +116,7 @@ export const User = {
       fileType: 'image',
       previewOpen: true,
       showPreview: false,
+      thumbnail: true,
       columnWidth: 150,
       masterFilter: ['.png', '.jpg', '.jpeg']
     }