Prevent deletion of edited queries with down array

When you use :arrow_up: to see the last query, make some edits, then press the down arrow, it deletes the query and you lose your changes. Ideally, after edits are made it shouldn’t be possible to accidentally delete the query with the down arrow.

Start by reproducing the Gel CLI REPL history behavior: recall a query with the up arrow, edit it, then press the down arrow. Trace the REPL's history and arrow-key handling; done means edited queries are not deleted and their changes remain available after pressing down.

Written by the indexing model from the issue text.