The existing 'Run selected test(s) in new process' button just gives the selected tests high priority. This is very irritating when longer running tests are clogging the queue. I often go to the Processing Queue to kill the tests I don't care about so that my test will start sooner. Worse, sometimes the test I want runs together with long tests I don't want, so I can't kill just the long tests without removing my requested test as well. Just run my test, right now! The others can wait.