[BUG #8609] Append drawer widget to root in unit tests
[BUG #8609] Call super at the end to access parent widget
[BUG #8609] Add widget factory test to drawer
[BUG #8609] Enable widget factory for navigation widget
[BUG #8609] Remove obsolete timeout in widget factory test for buttons
[BUG #8609] Add factory test for navigation widget
[BUG #8609] Dispose button widget when factory test is finished
[BUG #8609] Add additional assertions to navigation widget factory test
[BUG #8609] Add additional assertions to drawer widget factory test
[BUG #8609] Add additional assertions to carousel widget factory test