The preview block caches the deletion estimate from the last refresh.
When the user toggles whitelist channels afterwards the cached number
no longer reflects the current selection. Snapshot the whitelist on
refresh and detect drift on every frame; on drift, grey out the counts
and surface a stale hint plus an emphasised refresh button. Sits
alongside the existing Cleanup_Help_SavedNote, which warns about a
different mismatch (mutable vs saved) and stays as-is.
JonKazama-Hellion
7c52e890e6