Mail composer's toolbar has some issues with styling dropdowns

[GretaD]

Steps to reproduce

1. Go to mail app and click new message
2. Click format text
3. Try styling the text

Expected behavior

I can read the text on the dropdowns and menues dont overlap

Actual behavior

Mail app version

latest

Nextcloud version

No response

Mailserver or service

No response

Operating system

No response

PHP engine version

None

Nextcloud memory caching

No response

Web server

None

Database

None

Additional info

No response