PM-15039: Update welcome screen for design audit

[david-livefront]

🎟️ Tracking

PM-15039

📔 Objective

This PR updates the Welcome Screen to to ensure it is up to the latest design spec based on a design audit.

📸 Screenshots

Before	After

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions[bot]]

Checkmarx One – Scan Summary & Details – e59df917-f7f5-4b76-88e4-5bb6d8203657

Fixed Issues

Severity	Issue	Source File / Package
	Unpinned Actions Full Length Commit SHA	/crowdin-pull.yml: 26

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.00%. Comparing base (2d15c48) to head (063871e). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4328 +/- ## ======================================= Coverage 89.00% 89.00% ======================================= Files 452 452 Lines 38997 38998 +1 Branches 5484 5484 ======================================= + Hits 34710 34711 +1 Misses 2377 2377 Partials 1910 1910 ```

:umbrella: View full report in Codecov by Sentry.
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🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[david-livefront]

Thanks @dseverns-livefront