Select rows in the register and the bulk bar appears. Admins can change status, criticality or category across the selection, or delete it.
Undo restores each row
Every bulk action is kept with the value each row had before. Undo puts every row back to its own previous value — not one shared value — because half a selection was rarely in the same state to begin with. Each action can be undone once.
Moving a selection to another location is available through the API but not yet in the bulk bar.