BUG: Cannot see full list of groups in Safari on login

When opening the root page of Kotahi on Safari, the dropdown list of groups is obstructed by Safari's password autofill. The user must first press `esc` before being able to see the full list of users can see the items at the top of the list.

<img width="413" height="462" alt="Image" src="https://github.com/user-attachments/assets/66770e48-47ac-42f8-afa9-46641558e3e7" />