Entity editor header WIP

[kachkaev]

🌟 What is the purpose of this PR?

⚠️ Known issues

🚫 Blocked by

• [ ] ...

🐾 Next steps

🔍 What does this change?

• ...

📜 Does this require a change to the docs?

• The docs for x need updating to explain that y

🔗 Related links

• Asana task (internal)

🛡 What tests cover this?

❓ How to test this?

1. Checkout the branch / view the deployment
2. Try X
3. Confirm that Y

📹 Demo