I wasn't even aware of that hidden search, scrolling up. Thanks for the tip.
I had in mind a "multi-tiered" feature thoug, yer.
The search doesn't pick up what is not in the thread you're in. And mostly I am using a due date list, and if it's not in the coming week then I have to get out to a list which embeds all tasks to perform the search again.
But again, at least there is a mobile solution :D