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

app/Config/dompdf.php

@@ -7,9 +7,8 @@
  * Configuration should be altered via the `.env` file or environment variables.
  * Do not edit this file unless you're happy to maintain any changes yourself.
  */
-
 $dompdfPaperSizeMap = [
-    'a4' => 'a4',
+    'a4'     => 'a4',
     'letter' => 'letter',
 ];