autocomplete order should be case insensitive

[eiked]

autocomplete :artist, :name

currently generates sql (using postgres)

SELECT artist.id, artist.name FROM "artist" WHERE (LOWER(artist.name) ILIKE 'test%')
ORDER BY artist.name ASC LIMIT 10

while I believe it should be change to generate:

SELECT artist.id, artist.name FROM "artist" WHERE (LOWER(artist.name) ILIKE 'test%')
ORDER BY LOWER(artist.name) ASC LIMIT 10

aka the order of results should also be based on lowering