INT-1577 handle corrupt preference files gracefully, ignore extra props (#426)

Author: rueckstiess

package.json

@@ -142,7 +142,7 @@
     "react-bootstrap": "0.29.5",
     "react-dom": "^0.14.8",
     "semver": "^5.1.0",
-    "storage-mixin": "^0.6.2",
+    "storage-mixin": "^0.7.2",
     "tunnel-ssh": "^3.2.1-beta",
     "turf-destination": "^1.2.1",
     "turf-distance": "^1.1.0",

src/app/models/preferences.js

@@ -6,7 +6,7 @@ var electronApp = require('electron').remote.app;
 var debug = require('debug')('mongodb-compass:models:preferences');
 
 var Preferences = Model.extend(storageMixin, {
-  extraProperties: 'reject',  // prevents bugs
+  extraProperties: 'ignore',
   idAttribute: 'id',
   namespace: 'AppPreferences',
   storage: {