A minor but useful improvement

As it stands now if you are editing your deck, and you sort, the program does an alright job at sorting, but is missing the "intelligence" displayed by some other programs (even Windows, gasp!). I'll give you an example.

If you sort by Category, and you have the following categories:

Example 1
Example 10
Example 11
Example 2
Example 3
etc...
Example 9

The 10 and 11 should go to the bottom. Obviously this is a matter that users can just deal with, and only applies if you have the same exact category name used many times, but at least, it applies to me, so I'm sure other people see this problem.

If the fix is relatively simple, I think it would be cool to implement this change because it contributes to the feel of Mnemosyne as an intelligent program, as it truly is.