I'm pretty sure I read about a way to do this in the past, but I now I'm looking for it and I can't find it. I have a saved scene I use constantly, and it would save me a lot of time to be able to add it with Ctrl+A instead of having to navigate to the folder its in every time.
...aaand as I was writing this I remembered that you can "Favorite" files and they'll show up on top of FileSystem. Still, I need to scroll up (I have many many folders) to do that and Ctrl+A would be faster 😃