Fix: Update sidebar style for WordPress 6.7 compatibility

[jonwaldstein]

Resolves GIVE-1509

Description

WordPress 6.7 introduced some new css classnames to the sidebar we are using that are causing styling issues:

• block-editor-tabbed-sidebar__tablist-and-close-button
• .block-editor-tabbed-sidebar

This PR adds some specific css tweaks to these classes to prevent:

1. The sidebar tabs from showing (Blocks, Patterns, Media tab)
2. The sidebar width becoming fixed with a scrollbar

Affects

The from builder sidebar on WordPress 6.7

Visuals

Before

wp-6.7.mov

After

Testing Instructions

• Install WP 6.7-RC
• Make sure the form builder sidebar works as expected

Pre-review Checklist

• Acceptance criteria satisfied and marked in related issue
• Relevant @unreleased tags included in DocBlocks
• Includes unit tests
• Reviewed by the designer (if follows a design)
• Self Review of code and UX completed

[JasonTheAdams]

Great job catching this, @jonwaldstein! 💪

[JoshuaHungDinh]

Looks good 👍

testing.mov

[rickalday]

Passed manual QA tests.