CLI view usability issues

[mikeweilgart]

New to hatop. Poking around and I couldn't work out how to use the CLI view properly. There are a couple of especially crucial problems:

1. Backspace doesn't work so I can't fix mistakes. Also if I use the command "prompt" I get "command not allowed: prompt" but since the word "prompt" remains typed in and can't be backspaced, I have to ctrl-c the whole program.
2. There is no scrolling so I can't view the entire output of "help" so I don't have a clear picture of all the commands available.
3. The man page apparently doesn't contain the guidance on the use of the CLI view so I can't bypass my inability to read that "help" output within the program. (Actually I don't have man pages installed but I looked through the file in the man directory in this github project and didn't find the CLI help.)