Sure would be nice to have something like this:

As you start down the rabbit hole when looking thru code, after 5 mins you could come back to these search results and not even remember what these results were based on.
-OR-
After doing 1 "Find Refs", you have to do another one, and maybe another one.
Then, you need to go back to the top of where that research started... but you can't remember exactly where that was. And/Or you have to navigate TO that element to do the "Find Refs" from there.
This history would make a lot of sense.
-ALSO-
The Search Results tab should help us out a little more !