Differentiate between imported smart materials and created smart materials
When you go into "Your Assets" in the assets shelf it will still show imported smart materials from File > Import Resources AND created smart materials by Right Click > Create Smart Material. There should be a way to only show smart materials from "Create Smart Material" and vice versa, there is other ways of doing this that can be discussed in the comments.
Anthony Lobl 0 commented
Another way is branching off "Your Assets" into other categories but that would be ugly and confusing, also require changing a lot of documenation, I want to see if anyone has any other ideas of how something like this would be like.