[REQUEST] Emacs keybindings

**Is your feature request related to a problem? Please describe.**
No it's not.

**Describe the solution you'd like**
I'd like the support of Emacs keybindings, at least to arrows while browsing running processes, just like htop does.

**Additional context**
As an emacs user, is very intuitive for me to find the same behaviour in other applications. I think other emacs users could find this feature useful.