PM-17377: Update text, formatting, and style for the environment selector

[david-livefront]

🎟️ Tracking

PM-17377

📔 Objective

This PR makes small tweaks to the Environment selector UI.

📸 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]

Checkmarx One – Scan Summary & Details – 6f39d5e5-d432-4fc7-960c-4677d679a69f

Great job, no security vulnerabilities found in this Pull Request

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.40%. Comparing base (3a6db38) to head (dcae026).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4623   +/-   ##
=======================================
  Coverage   88.39%   88.40%           
=======================================
  Files         603      603           
  Lines       40905    40907    +2     
  Branches     5755     5755           
=======================================
+ Hits        36160    36162    +2     
  Misses       2742     2742           
  Partials     2003     2003           

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[dseverns-livefront]

[david-livefront]

Thanks @SaintPatrck & @dseverns-livefront