Column picker improvements

This release introduces an enhanced column picker that improves usability and efficiency when selecting dataset columns. It replaces the existing scrollable picker with a searchable modal while preserving existing behaviour.

New features

Enhanced column picker

A new modal-based column picker is available across dataset detail pages for users working with datasets.

• Columns can be searched by name using a case-insensitive search.
• Selected and unselected columns are clearly distinguishable.
• All available columns can be selected, or all non-locked columns can be deselected.
• Columns used in filters remain selected and cannot be deselected, with tooltip guidance.
• Column selection can be reset to the original state before changes.
• Changes can be applied only when the selection is valid and modified.
• A warning is shown when navigating away with unsaved changes.