Feature Request - Function Column

Hello!
Before anything I love this software!
So when I brew a deck (especially EDH) I find that I sort through TONS of cards that all perform the same function (e.g. mana accelerators or gives everything vigilance or commander protection). Once I find all the cards I can that serve the function I need I decide how many I want and pick the best options. It would be really nice if there were an editable "function" column in the decklists that you could use to sort your cards by function.
Thanks!
-Alex