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/models/index.js

@@ -5,6 +5,8 @@ import Collection from './Collection';
 import Document from './Document';
 import Event from './Event';
 import Integration from './Integration';
+import Notification from './Notification';
+import NotificationSetting from './NotificationSetting';
 import Revision from './Revision';
 import Share from './Share';
 import Star from './Star';
@@ -19,6 +21,8 @@ const models = {
   Document,
   Event,
   Integration,
+  Notification,
+  NotificationSetting,
   Revision,
   Share,
   Star,
@@ -41,6 +45,8 @@ export {
   Document,
   Event,
   Integration,
+  Notification,
+  NotificationSetting,
   Revision,
   Share,
   Star,