Let's add some nice shortcuts to edit text blocks without leaving the keyboard! These should act to transform the currently selected text block, whether or not text within it is selected:
- h1 - cmd/ctrl + opt + 1
- h2 - cmd/ctrl + opt + 2
- h3 - cmd/ctrl + opt + 3
- p - cmd/ctrl + opt + 0
And we already have list - cmd/ctrl-opt-L
So let's make blockquote - cmd/ctrl-opt-B
Update HelpPopover to document the shortcuts as well!