[BUG] [Board] Board search does not find items that are in the collection

[Omga4000]

The board's search box (beside the Filter button) misses items two ways.

Items not currently rendered

1. Open a Board view on a collection large enough that a column is paged.
2. Pick an item in that collection that is not rendered yet.
3. Search its exact title. No match.
4. Click "Load More" until the card appears, then search again. Match.

With show_rightmost_column_last_50 enabled there is no "Load More", so those items stay unfindable.

Text in the description

1. Pick an item whose description contains a phrase not in its title.
2. Make sure its card is visible on the board.
3. Search that phrase. No match.

Advanced Search finds it immediately in both cases.

Expected: the board search finds items in the collection, including on description text.
Actual: no results, with nothing indicating the search was limited.