UI issue : Follow up on expand overlap the other mails

[Aveyron-RetD]

Steps to reproduce

1. Go to your priority mailbox
2. Click on + after follow up
3. See the results

Expected behavior

the mails should expand to allow the other mails to be displayed

Actual behavior

Everything is overlapped

Mail app version

5.11.5

Nextcloud version

33.0.6

Mailserver or service

No response

Operating system

No response

PHP engine version

No response

Nextcloud memory caching

No response

Web server

No response

Database

No response

Additional info

[odzhychko]

I could reproduce the issue with Mail 5.12.0-rc.1

I could reproduce it reliably following the steps from the description and then increasing the browser zoom.

Maybe some offset calculation is breaks with zooming.