Various code cleanup.

app/Support/Preferences.php

@@ -144,6 +144,19 @@ class Preferences
         return $result;
     }
 
+    /**
+     * @return Collection
+     */
+    public function all(): Collection
+    {
+        $user = auth()->user();
+        if(null === $user) {
+            return new Collection;
+        }
+
+        return Preference::where('user_id', $user->id)->get();
+    }
+
     /**
      * @param User            $user
      * @param string          $name