Improve cli hotkeys to support OSX better

[cblgh]

trafficstars

we're using alt as a modifier, and it's not behaving as intended on OSX

Tasks

• [ ] experiment on OSX and pinpoint what's weird
• [ ] look into how keypress works
• [ ] look into patching functionality upstream in either neat-input or keypress
• [ ] use a new modifier if all else fails
• [ ] rethink hotkey usage

[rinchen]

https://github.com/dd-pardal/tty-events might be another option.

[hackergrrl]

It could be a configuration issue. As I remember, the default Terminal.app needs a config bit flipped to allow the Alt key to be accepted.