Make the fuse daemon process a parent of the payload process rather than a sibling

Currently running an appimage creates two processes:

1. The fuse daemon process: \.appimage
2. The actual payload process, which can be named anything

My users get confused by this, as they think they should be able to go to "task manager" and kill the process that they just ran. However, this just kills the fuse process, and the application keeps running to some extent. It crashes eventually when the application attempts to read something that wasn't already cached.

To me, it would be clearer in the process list if the fuse daemon process was a true parent of the payload process. Since the child in this case can't work without the parent, it would also be nice if killing the "parent" also killed the "child."

It's perfectly possible I'm misunderstanding something here though.

Thanks for a great software distribution system!