In the category filter tab I'm missing the same search that I have in the category tab.
Same thing with the fold/unfold all which is the tree dot button in the category tab.
With lots of nested categories, but also albums and collections and especially with properties, it's a huge task to find anything in there.
A button for folding/unfolding all could already help but in the long run a search would be better (that only unfold the required branch instead of the whole tree)
Filter/Search for category filter
Moderator: xnview