test test_switch_to_list_view_mode failing in ci

[Sergio Cazzolato]

I can reproduce it in vivid using trunk:

This is the trace:

Traceback (most recent call last):
  File "/home/sergio/workspace/canonical/ubuntu-rssreader-app/bugs/bug2/tests/autopilot/shorts_app/tests/test_rssreader.py", line 87, in test_switch_to_list_view_mode
    self.app.main_view.change_view_mode("isNotListMode")
  File "/usr/lib/python3/dist-packages/autopilot/logging.py", line 46, in inner
    return f(instance, *args, **kwargs)
  File "/home/sergio/workspace/canonical/ubuntu-rssreader-app/bugs/bug2/tests/autopilot/shorts_app/__init__.py", line 266, in change_view_mode
    "StyledItem", objectName="popover_foreground")
  File "/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 295, in wait_select_single
    return self.select_single(type_name, **kwargs)
  File "/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 244, in select_single
    raise StateNotFoundError(type_name_str, **kwargs)
autopilot.exceptions.StateNotFoundError: Object not found with name 'StyledItem' and properties {'objectName': 'popover_foreground'}.