Store user-added headers in local storage or other place

[zihotki]

Very often authorization in APIs is done via request headers and if user adds some headers they are very likely needed for all requests in that API. Requiring user to add the headers again after a page refresh adds a lot of friction. The headers should be cached in local storage or any other available place.

[brendanjmuir]

I also think this would be an awesome enhancement. I have a situation where I need to add custom header fields to every request and think it would be great to have a place to specify these headers within the test tool's config or code.