Give users the option to not automatically hide completed tasks
I don't like that Wunderlist automatically hides my completed tasks, because sometimes I don't want that to happen. For instance, when I'm using Wunderlist to create a list of things I need to pack for a trip, I need to be able to quickly look at the list and know what I've already packed. However, when I check off stuff as I pack it, that hides the items from the lists and prevents me from being able to see it.
There is thread asking for this, but not much of the posters seem to vote.