[proposal] Use of timeout to choose between -1 and -2 commands

[syl20bnr]

To lower the number of required key bindings one trick could be to use -2 command but fallback to -1 if only one character is entered within 0.5 second (I guess a high value like half a second would give a better UX than something faster).

[abo-abo]

Let me know if it's fine, and open a new issue if you want others.