title: VS2012: Clear the test results in Test Explorer when re-running a test that previously failed
body: <p>On running an individual test in VS2012, a window is shown at the bottom of Test Explorer that includes (assuming failure) a red icon with "Test Failed" next to it.  There follows the failure message with "elapsed time" directly beneath.</p>
  
  <p>I would like to know simply whether there is a way to clear this window.  For instance if I right-click my test and select "Debug Selected Tests", it is somewhat confusing as I step through the test that this test-results window still shows the failure from a past test-run.</p>