mcfly.bash unbinds \C-g

With Bash 5.1.16 on Ubuntu 22.04 

```
   bind -m emacs -x '"\C-g": "echo 1"'
   bind -m emacs -x '"\C-x1": mcfly_search'
   bind -m emacs -x '"\C-x2": mcfly_accept'
   bind -m emacs '"\C-r":"\C-x1\C-x2"'
   
  bind -m emacs  -X
```

unexpectedly shows no `\C-g` binding.
It works fine if `\C-g` is bound after sourcing `mcfly.bash`