Bug 1086277 - Add a test for add & delete a divider on homescreen

This wait is here just to make sure we can interact with the home screen.

I see your point of having to be careful and avoid some bad cases but I think if we get in one of the cases from above we have to investigate what changed and make sure it's not a bug.

We try not to make our test too smart as that might lead to false positives.