Add ability to see whether a field is on an active form

I love the feature that allows us to see which forms a field is on, but what I see as missing is the ability to see if any of these are active or have ever been active. It would be great to be able to see if the form is attached to anything, historical or active. As I am trying to clean up this system, I find many fields that seem similar and it is hard to determine which one should be removed. Unless you have unlimited time, there is really not a good way to do this.