Updating this as it’s been a while. We’ve discussed this a few times and can see how it would be useful in a few cases (such as mass-moving expenses between groups – if you or anyone else needs help with that, feel free to send us a support email). We’ll keep it open for now for further voting and comments.Ewan Robinson commented
I'd like to second this request. Bulk editing would be very useful - for example, it would help for splitting a category of expenses unevenly (i.e. some people in a shared house eat more groceries than others). Doing it one-by-one is extremely cumbersome and time consuming.