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/models/Collection.test.js

@@ -234,6 +234,7 @@ describe('#removeDocument', () => {
       userId: collection.creatorId,
       lastModifiedById: collection.creatorId,
       createdById: collection.creatorId,
+      publishedAt: new Date(),
       title: 'Child document',
       text: 'content',
     });