Improvement: Creating Core/NoSQL containers with confusing UX around PK

[tnaum-ms]

When a new container is created, a user is being asked for:

• the container name ✅
• the first partition key ✅
• the second partition key ⚠️
  • here, the value from the first partition key is being shown
  • this leads to confusion as it's hard to spot the change of the title of the dialog

Expected behavior:

• the second partition key value is empty so that the user is more likely to notice that he's being asked to provide the second partition key

https://github.com/user-attachments/assets/1feef785-6703-4fba-9285-4d5189170cd8