Add an option to disable auto-ordering of sticker packs.
If you have a lot of packs, it make sense to order them in a way that makes it easy for you to find the right sticker. This has been the behaviour until recently (and is still how telegram desktop works).
The new behaviour is to put the most recently used pack first on the list and it makes finding the correct sticker much harder than if the packs are in a predefined order.
So there should be an option to keep the old behaviour.