Smart update on all datasets
I did a bunch of test on https://huggingface.co/datasets/datasets-maintainers/test-smart-update and it works fine: edits to README.md unrelated to the `configs` don't trigger a full recomputation of the viewer :)

I also tested with image data and they are correctly handled.
Smart update on all datasets: I did a bunch of test on https://huggingface.co/datasets/datasets-maintainers/test-smart-update and it works fine: edits to README.md unrelated to the `configs` don't trigger a full recomputation of the viewer :)

I also tested with image data and they are correctly handled.