Failing widgets tests #276
Description
Describe the bug
There is are some failing tests that are due to and AttributeError. I have traced the error to a version change in ipywidgets. If we run the tests with ipywidgets==7.7.1 the tests pass (locally at least, trying to reproduce the errors). With ipywidgets==8.0.x (tried 8.0.4 and 8.0.0) the tests fail showing the error AttributeError: 'Folder' object has no attribute 'on_displayed'.
Will go ahead and investigate what changed and will add this as a bug fix in the latest PR #275.
Update:
The on_displayed was removed as a callback according to the changelog in ipywidgets==8.0.0 with the attached issue