Hello, just a little idea. When your project starts to grow you usually will have lots of FSMs doing things "atomically". Browsing between them can be a pain sometimes.
There is a very useful feature in the FSM browser called "Recently selected", problem is that if you restart your scene in runtime, it deselects and turns back to "All". Also, you must select it every time you run Unity (could this option be saved between unity sessions?).
Anyway, maybe PM could have a permanent FSM list with the 3-4 FSMs you usually work at a time, by marking this FSMs as "Favorites" and quickly jumping between them, letting user add and delete FSMs from this list.
In summary, favorite lists are always useful and increase productivity