* Move to Slate 44, start using types more extensively in Composer
* More types and cleanup
* Expose the editor object to the draft session, try exposing editor to session
* Bump to Slate 45 for https://github.com/ianstormtaylor/slate/pull/2225/files
* How did the unsubscribe plugin get in here
* Bump Slate types, fix TS errors, start testing
* Polish
* Fix issue with emails not shrinking when you close quoted text
* Fix the “remove quoted text” button
* More polish
* Fix issues with PR, improve typings
* Remove spurious log
