Filter by multiple sample categories

[tobinhammer]

Say you have two mapping categories, Fruit (with apple, pear, banana as levels) and Root (potato, carrot as levels). It would be nice to filter to keep only "Pear" and "Carrot" samples with one command. ATM you can only use one filter_cat.

[leffj]

Will look into. Right now, you can use two separate commands to accomplish.