Post to Slack (#603)

* Migrations

* WIP: Integration model, slack perms / hooks

* So so rough it pains me. Building this new model is revealing just how much needs to be refactored

* Working connect and post

* Cleanup UI, upating documents

* Show when slack command is connected

* stash

* 💚

* Add documents.update trigger

* Authorization, tidying

* Fixed integration policy

* pick integration presenter keys

app/utils/importFile.js

@@ -29,7 +29,7 @@ const importFile = async ({
       if (documentId) data.parentDocument = documentId;
 
       let document = new Document(data);
-      document = await document.save();
+      document = await document.save(true);
       documents.add(document);
       resolve(document);
     };