search:title filters the values collected by f.valuesAll, so the grouped list narrows while you type without the tiddlers themselves being searched.

Two definitions are added to the plain grouped list:

• groupLabel is the human readable name shown beside the input
• f.valuesFound applies the search to the collected values

An empty box is a no operation, so the whole list comes back. The clear button appears only once there is something to clear, and puts the cursor back in the input.

Type ann to match Dickinson and Finnemann, wi to match several at once, or zzz to fall through to the emptyMessage of the outer list.