Fix/dataset table refresh

[Creylay]

Summary

This PR fixes an issue where the converters/explorers table in the notebook view was not updating consistently after deleting a converter. Now, the table waits for the backend job to finish before refreshing, ensuring the UI always reflects the correct state. The approach mirrors the strategy used for dataset creation and deletion.

Type of change

• Bug fix.

Changes

• Fixed inconsistent table updates after deleting a converter in the notebook view.
• Implemented job polling after converter deletion, updating the table only when the backend job completes.
• Ensured UI consistency by reusing the dataset job-waiting strategy.

How to Test

1. Open a notebook with multiple converters applied.
2. Delete the last (or any) converter.
3. Observe that the table only updates after the backend job finishes, always showing the correct state.
4. Reloading the page should not change the displayed data (no more inconsistencies).

Screenshots

Notes

• This fix uses the same polling logic as dataset operations for consistency.
• No new dependencies were added.