Select is missing a scrollbar inside modal
### Node Version

20.10.0

### NPM/Yarn/PNPM Version

9.12.2

### Strapi Version

5.10.2

### Operating System

Linux (Other)

### Database

SQLite

### Javascript or Typescript

Typescript

### Reproduction URL

_No response_

### Bug Description

When users click on "Fill in from another locale" button, the select is missing a scrollbar. Users are able to navigate the select with keyboard navigation. Ideally scroll should work.

I also tested with latest version of strapi 5.11.3 and the issue still persists. Also tested on a fresh strapi install.

### Steps to Reproduce

1. Have localisation enabled for content type
2. Have an entry with multiple localised versions
3. Click on "Fill in from another locale" button
4. Click on select
5. Attempt to scroll

### Expected Behavior

Scroll should work

### Logs

```shell

```

### Code Snippets

_No response_

### Media

<img width="1126" alt="Image" src="https://github.com/user-attachments/assets/517ee822-9ce5-4462-be34-10adba627383" />

### Additional information

_No response_

### Confirmation Checklist

- [x] I have checked the existing [issues](https://github.com/strapi/strapi/issues) for duplicates.
- [x] I agree to follow this project's [Code of Conduct](https://github.com/strapi/strapi/blob/develop/CODE_OF_CONDUCT.md).