Advanced dropdown styling broken in link

[soerenmeier]

Description

In >=5.6.0 the dropdown styling is broken.

Before (5.5.0)

After (>=5.6.0)

Steps to reproduce

1. Install Craft
2. Install CKE with >=5.6.0
3. Create a section, entry type and field
4. Toggle "Open in new tab" in "Advanced Link Fields"
5. Edit a page in that section and add a link

Additional info

• Craft version: 5.10.11
• PHP version: 8.4.22
• Database driver & version: MySQL 8.0.40

[linear-code]

PT-3403