Reimplement accidental navigation prompt in payload formatter views

[kschiffer]

Summary

Due to updates applied in #6327, we had to remove accidental navigation protection for the time being. This should be reimplemented soon.

Current Situation

When the user accidentally navigates away from the payload formatter form while entering a payload formatter, the Console will navigate away and all progress will be lost.

Why do we need this? Who uses it, and when?

We need to add a prompt that makes the user confirm the navigation so that accidental navigation can be prevented.

Proposed Implementation

I have to look at ways to implement prompting with the new react-router v6. From some initial research, it doesn't appear that straight forward.

Contributing

• I can help by doing more research.
• I can help by implementing the feature after the proposal above is approved.
• I can help by testing the feature before it's released.

Code of Conduct

• I agree to follow TTN's Community Code of Conduct.