grouping cards?

[SuperFuzzyBear]

(more of a feature than an issue)

sometimes I like to spread related ideas across multiple cards to organize a large idea, but when I push them back 1 month they all randomly get a different showtime so they won't come back into the main list together. It would be useful to be able to push a group/set of cards the same amount of time, or just create a concept of a grouping of cards.