Add keyboard shortcuts: new, escape, and hard break (#552)
* Add keyboard shortcuts: new, escape, and hard break
* Add preferences modal
* Remove code accidentally re-added due to rebase
* Fix incorrect copy and lint
* Put stuff back so diffs are clearer
* Re-add invite codes to settings
* Address comments
* Tune the copy
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Co-authored-by: Paul Frazee <pfrazee@gmail.com>
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