Create a generic filter you can apply to any field
For instance. Filter: _____________ in the last 30 days. Instead of have the filter tied to a field, make it so you can apply the filter to any field with a date.
Bryan Dreller commented
Hi Cameron, if I understand your question I think the good news is that this is already under development. In short, we will be introducing additional "canned" filter criteria options such as "this many days ago", "next week", or as you point out, "within the last [x] days/weeks/etc.
Does this sound about right? Thanks for the suggestion!
Or depending on filter any field the filter could possibly apply to