Feature request: If there's a slider with the thumbnails of all the textures which can be browsed in single page, that would make the searching easier, instead of clicking next page so many times!
However they're not being a dick about it - they let you download the whole bunch of tiles as PNG and as a .pat file so you could just then use your file manager to scan the PNGs.
What you don't get then is the quick view of the tiles in use but it shouldn't take long to knock up a quick script that will take a directory of tiles and give you a block of bgs to look at.