Bringing duration filters/smart lists to parity

Just to preface, I love Griply and am ecstatic at the new smart lists. But what about durations?

* Missing ability to filter on "no duration" (tried using zero or leaving blank, did not list them)

* Missing ability to sort on duration (useful for seeing what can be done quickly in daily view)

* Entering a duration is still wonky. Why can one quick enter "30m" but when using the UI to actually type in a duration from the dropdown, this does not work, and one has to type "00:30" (exactly, as other permutations also do not work)

Making the plea for a little love to bring duration up to parity. :