Draft Documents (#518)

* Mostly there

* Fix up specs

* Working scope, updated tests

* Don't record view on draft

* PR feedback

* Highlight drafts nav item

* Bugaboos

* Styling

* Refactoring, gradually addressing Jori feedback

* Show collection in drafts list
Flow fixes

* Ensure menu actions are hidden when draft

server/test/support.js

@@ -67,6 +67,7 @@ const seed = async () => {
     userId: collection.creatorId,
     lastModifiedById: collection.creatorId,
     createdById: collection.creatorId,
+    publishedAt: new Date(),
     title: 'Second document',
     text: '# Much guidance',
   });