Fixed default registration role display options

- This also allows an admin to choose not to have a default role.
- Also applied latest styleCI fixes.

For #3220

resources/lang/en/common.php

@@ -75,6 +75,7 @@ return [
     'status_active' => 'Active',
     'status_inactive' => 'Inactive',
     'never' => 'Never',
+    'none' => 'None',
 
     // Header
     'header_menu_expand' => 'Expand Header Menu',