Preview Warning Banner Enhancements

[KimberleyChong]

Description
Some improvements to the previewWarningBanner following feedback and suggestions:

• Change banner colour from alert-info to alert-warning
• Parameterize the banner to display the input featureName to provide more information on what the banner is referring to
• Fix spacing for the starred Notebooks tab so it aligns with the other banner when no starred Notebooks

Colour Change:

• Before:
  
• After:
  

Spacing Fix:

• Before:
  

• After:
  

Additional
The user dropdown was bugging me... when you hover it doesn't look clickable 🤔 minor fix:

• Before:
  
• After:
  

Review Instructions
Preview banner should say "Notebooks is an early access feature..." etc instead of "This is an early access feature...", banner should be yellow and follow images attatched.

Issue
SEAB-5262

Security
If there are any concerns that require extra attention from the security team, highlight them here.

Please make sure that you've checked the following before submitting your pull request. Thanks!

• Check that your code compiles by running npm run build
• Ensure that the PR targets the correct branch. Check the milestone or fix version of the ticket.
• If this is the first time you're submitting a PR or even if you just need a refresher, consider reviewing our style guide
• Do not bypass Angular sanitization (bypassSecurityTrustHtml, etc.), or justify why you need to do so
• If displaying markdown, use the markdown-wrapper component, which does extra sanitization
• Do not use cookies, although this may change in the future
• Run npm audit and ensure you are not introducing new vulnerabilities
• Do due diligence on new 3rd party libraries, checking for CVEs
• Don't allow user-uploaded images to be served from the Dockstore domain
• If this PR is for a user-facing feature, create and link a documentation ticket for this feature (usually in the same milestone as the linked issue). Style points if you create a documentation PR directly and link that instead.
• Check whether this PR disables tests. If it legitimately needs to disable a test, create a new ticket to re-enable it in a specific milestone.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication