MessageBar - ai border and thinking css

[kmcfaul]

Chatbot's packaged styles should either include the new ai border and thinking modifiers, or pull from core, and MessageBar should have new flags to add these classes.

[github-actions]

🎉 This issue has been resolved in version 6.5.0-prerelease.10 🎉

The release is available on:

• GitHub release
• npm package (@prerelease dist-tag)

Your semantic-release bot 📦🚀