Currently the search panel can find ‘due dates’ that are ‘within the last’ x days, OR ‘within the next’ y days, but it cannot do both at the same time, which is commonly needed. This suggestion is to add a search option for X days back AND y days forward. It could be named anything appropriate… ‘Days Range’, ‘Days Window’, etc.
Note: The currently available ‘between’ option is not the same thing. Because, ‘between’ only looks for absolute dates, but the previously mentioned options look for dates that are relative to today. The suggestion is for a relative days search.