Support ipywidgets 8.x

[yakutovicha]

fixes #473

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 83.21%. Comparing base (dee5446) to head (2df17d6).

Files with missing lines	Patch %	Lines
aiidalab_widgets_base/computational_resources.py	22.22%	7 Missing ⚠️
aiidalab_widgets_base/structures.py	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #644      +/-   ##
==========================================
- Coverage   83.35%   83.21%   -0.14%     
==========================================
  Files          17       17              
  Lines        3586     3592       +6     
==========================================
  Hits         2989     2989              
- Misses        597      603       +6     

Flag	Coverage Δ
python-3.11	83.21% <50.00%> (-0.14%)	⬇️
python-3.9	83.24% <50.00%> (-0.14%)	⬇️

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[danielhollas]

Whoops, I had some comments during the hackathon that I forgot to submit.

[danielhollas]

Great to remove this. 🚀 Have you tested that the original reason for this widgetsnbextension pin no longer applies? (I think it was because of the NodeTree widget was broken?)

EDIT: It looks like we still need the widgetsnbextension based on our experience of omitting it in aiidalab-home. See this issue aiidalab/aiidalab-docker-stack#512 Definitely will need testing.