For those who are actually running all of the tests, current defaults for the FSharpQA suite are to use parallel execution + hosted compiler server. This results is a new compiler server console popping up and dying away every few seconds, which is rather disruptive if you are trying to do other work.

It's a simple change to make those windows hidden, just update constant in runall.pl to CREATE_NO_WINDOW.

Hosted compiler was initially very unreliable, so it was nice to be able to see the output. But it seems sturdy enough now, I think I will change the behavior to something less disruptive.