Prioritize cards you've already started learning

[dasnessie]

I have a deck of the 1000 most common French words. I obviously can't start learning them all at once, so I'd like to start with a few random words and then add more new ones when I've learned the others.

So far I'm doing that by setting the filters to Last tested: 24 Months ago to Now, and max number of cards to 20.

Would it be possible to add a filter option to prioritize started cards or even to sort the started cards by how long ago they became available again?

That way I'd always get my 20 cards to practice, with new one added only when no started ones are available.