Description

Appearance and Settings panel overlaps Patterns page header while scrolling down

Step-by-step reproduction instructions

1. Open the Site Editor from the dashboard.
2. Navigate to the Pattern section.
3. Click on the settings icon to open the appearance and settings panel.
4. Scroll down the page

Expected behavior
Scrolling should be disabled when the settings panel is open.

Screenshots, screen recording, code snippet

Environment info

• Device: MacBook Pro
• OS: Sequoia 15.0.1
• Browser: Chrome
• Version: 129.0.6668.101
• WordPress version: 6.7 beta-3
• Gutenberg version: 19.4.0

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes