Allow changes to the editing window layouts to be lockable for all requests, tests for a user

When editing a tests requests, allow the users to set up the screens as they need them for that session or user, and have a lock button so that for each request, the work area remains in the same configuration, so that they don't need to keep changing things around  each time.

A found in one session where I had to check every request I sent 20% of the time changing the environment around.