[touchpad/horizontal] touchpad.py seesm very flaky

The test runs, but constantly returns a failed code for seemingly no reason. The instructions say to click test to open GEdit with a file, then verify you can do horizontal scrolling. However, after that, it doesn't say what to do with the window.

In most cases I've seen checkbox open the apport prompt saying that touchpad/horizontal failed, even with GEdit still open. I have to manually change this to Yes because the actual scrolling part works.