ui/InboxViewController.md

+The InboxViewController gets its data from the DataHandler in form of a Folder object.
+Updates to the records are received via the NotificationCenter: 
+```
+NotificationCenter.default.addObserver(forName: Notification.Name.NSManagedObjectContextDidSave, object: nil, queue: nil, using: {
+            [weak self] _ in
+            self?.tableView.reloadData()
+        })
+```
+
+It provides links to the displayed mails, all mails of a contact, the ContactView of a contact, and the ContactView of the user.
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