Base model refactor (#810)

* Big upgrades

* WIP: Stash

* Stash, 30 flow errors left

* Downgrade mobx

* WIP

* When I understand the difference between class and instance methods

* 💚

* Fixes: File import
Model saving edge cases
pinning and starring docs
Collection editing
Upgrade mobx devtools

* Notification settings saving works

* Disabled settings

* Document mailer

* Working notifications

* Colletion created notification
Ensure not notified for own actions

* Tidy up

* Document updated event only for document creation
Add indexes
Notification setting on user creation

* Commentary

* Fixed: Notification setting on signup

* Fix document move / duplicate stale data
Add BaseModel.refresh method

* Fixes: Title in sidebar not updated after editing document

* 💚

* Improve / restore error handling
Better handle offline errors

* 👕

server/presenters/collection.js

@@ -10,8 +10,9 @@ type Document = {
   url: string,
 };
 
-const sortDocuments = (documents: Document[]) => {
+const sortDocuments = (documents: Document[]): Document[] => {
   const orderedDocs = naturalSort(documents, 'title');
+
   return orderedDocs.map(document => ({
     ...document,
     children: sortDocuments(document.children),