fix: adjust menu icon style in the Submissions page

[fterra-encora]

Description

Adjusts menu icon style in the Submissions page, so as to address comment #6 on [FSADT1-930], which had been forgotten.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• New unit tests
• New integrated tests
• New component tests
• New end-to-end tests
• New user flow tests
• No new tests are required
• Manual tests (description below)

Checklist

• I have read the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• 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
• Any dependent changes have already been accepted and merged

Further comments

---

Thanks for the PR!

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Once merged, code will be promoted and handed off to following workflow run.
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[github-actions]

Current changelog

Bug Fixes

• adjust menu icon style (3ec7e70)
• move the page content after the header (#623) (e3cace3)

[sonarcloud]

[nr-forest-client-backend] Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[sonarcloud]

[forest-client-frontend] Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[sonarcloud]

[nr-forest-client-processor] Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information