wizards: show "previously selected" in-place when navigating back

followup to #2148

## Problem

Since #2148 , pickerPrompter.setRecentItem() always sorts the `recentItem` at the top of the list. This is useful when revisiting a new wizard, but perhaps less ergonomic when "navigating back" in an existing wizard.

## Requirements

> Basically I think we should move to the top for persisted items, but leave in-place when the user goes back a step.

Start by tracing pickerPrompter.setRecentItem() and the behavior introduced by #2148. Reproduce navigating back in an existing wizard versus revisiting a new wizard, then verify persisted items move to the top while previously selected items remain in place when going back.

Written by the indexing model from the issue text.