I actually find it quite difficult to browse through my collection now. I think a button should be added to sort per expansion (Original, AotA, EttSC). Additionally, I think sorting can be improved by allowing multiple sorting categories at the same time (applied in the same order as they were clicked). This way I don't need to browse my whole collection of commons or major token arcane items to find a common, major token arcane item.
There is a a button that sorts by expansion. It is just to the left of the keyword search box. It will give you all items from the base game, AotA or Sky Citadel. As for multiple sorting categories, I literally made a thread about it 5 minutes before you, and was probably typing it the same time you were. Obviously we think alike!
That button doesn't show up on laptops or small screens. It is possible to filter the sets by typing base, aota, or ettsc in the text box. You can then use item type filter, and the normal sorting options. Multiple keyword sorting is still out of reach at the moment.
