Only content data displayed with "Save as a file" and "Copy to clipboard" the Message

[armenuikafka]

Describe the bug Only content data displayed with "Save as a file" and "Copy to clipboard" the Message

Set up https://www.kafka-ui.provectus.io/

Steps to Reproduce

Steps to reproduce the behavior:

1. Navigate to Topics
2. Open the Messages tab for one Topic
3. Crete the Messages with Key, Content and Headers
4. Press the "Save as a file" / "Copy to clipboard" from menu

Expected behavior All the Message's data should be copied and exist in a saved file.

Screenshots

https://user-images.githubusercontent.com/104780608/182073185-5aaaa867-1a56-4a2c-bbfd-e8fc242f3bc6.mov

Additional context