Sorting the albums by Year

Sometimes I have problems in sorting the albums by the same artist. I explain: I would keep the albums sorted by year, however the problem is when there are two albums issued in the same year, such as Led Zeppelin I and Led Zeppelin II, issued both in 1969. Sorting the albums by year could cause that the album "II" goes before the album "I".
Is there a way to solve this problem, already present or planned for next realases? It would be great the possibility to drag and drop each album and save a custom sorting.
Thanks,
Dago