I’m sorry, but yet again your UI tweaks are not improving things.
This may actually work well, if you have a relatively small collection. But for people with large collections this is not an improvement. It will take forever to scroll through the collection to get to what you were looking for. However ugly the old dropdown list was, at least it was pretty fast to use. This new system is EXTREMELY slow, because of the progressive loading of the next page.
The filtering capabilities are a step towards the right direction, but they still need a lot of work IMHO. The way you’ve implemented multiple choices within the same button is very confusing, for example.