CDD-3255 Reduce padding around top nav.

[djl]

Description

Fixes #CDD-3225

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• Unit tests
• Playwright e2e tests
• Mobile responsiveness
• Accessibility (i.e. Lighthouse audit)
• Disabled JavaScript

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• Any styles in this change follow the 'STYLES.md' guide
• My changes are progressively enhanced with graceful degredagation for older browsers and non-JavaScript users
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[sonarqubecloud]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Unit tests coverage

Lines	Statements	Branches	Functions
	94.91% (4203/4428)	85.25% (1313/1540)	95.43% (753/789)

Tests	Skipped	Failures	Errors	Time
1630	0 💤	0 ❌	0 🔥	28.668s ⏱️