Description

Adds <Ctrl-p> and <Ctrl-n> binds to the command-line. These are from Emacs, but you can navigate up and down menus all over macOS and its apps with these keybinds.

Relevant PRs

Refactor that removed the binds: #5180
adding "vim keybinds": #4019

Confirmed working on macOS (safari, firefox, and chrome). On windows, <Ctrl-n>: opening a new window takes priority, but that's expected behaviour.

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Closes issue discussed in discord.