Schema suggestions — How current a review stays

A review is kept so you can come back to it: reopening the panel shows the last one immediately instead of spending another. It tells you when it ran, and Review again starts a fresh one. It stops being offered on a table's toolbar once its evidence no longer holds — when you change the schema, when the number of records has moved appreciably, or after a fortnight. The map still shows it after that, with the reason and a button to run another, because there the caveat is on screen where a quiet button on a grid has nowhere to put it.