HTTP 404 or HTTP 500 requests do not have a Request tab in the network inspector

[navaronbracke]

When the Network tab displays the details for a HTTP call that returned an error response (i.e. HTTP 500 or HTTP 404), the Request tab is not visible, so I cannot inspect the payload of the request that I sent.

Example:

HTTP 200 request, Request tab is visible.

HTTP 500 request, no Request tab is visible.

I found https://github.com/flutter/devtools/issues/6955 but that is for copying the response, not the actual request that was sent.

I propose that we also enable the Request tab for requests with a HTTP 4xx or 5xx status code.