Seeing test failures in graphics scrum for ListViewKeyInputTest on Mac

[Richard Bair]

> I can get it to consistently fail on my end, so I will see if I can find the cause.

Working with Jonathan, the problem is that the tests need to send an extra "ctrl" keystroke for some cases on Mac, but not on Windows. I'll update the graphics with the fix and then during integration, the controls team will need to remove the @Ignore annotations (or do it now and then merge later).

Richard