Add the ability to group entries with the same data into one entry with the combined quantities

Basically, it'd be something like a button or a setting to make it so all entries (or specific ones if you're feeling ambitions) with the same entry data (except for quantity of course) would be grouped into one entry with the combined quantities. I've had an issue with sorting my large Pokemon card collection where I have numerous entries for the same card and I think it'd be helpful to have a feature to combine all of these entries into one. For example, if you happen to get the same Pokemon card on multiple occasions, I'd like to make them all into 1 entry with a quantity of 4 than 4 entries with a quantity of 1. While it may be easy to do this once, having to do it for every duplicate entry would be very time consuming. Thanks!