Add a way for a user to override the site skin setting + fix mislabeled comment. (#6891)

* Add a way for a user to override the skin setting.

* Add site setting to allow user to change the skin.

* Fix skin list.

Co-authored-by: NMC <info@nmc-lab.com>

app/Http/Controllers/ProfileController.php

@@ -48,10 +48,9 @@ class ProfileController extends Controller
         $user->last_name  = $request->input('last_name');
         $user->website    = $request->input('website');
         $user->gravatar   = $request->input('gravatar');
+        $user->skin   = $request->input('skin');
         $user->phone   = $request->input('phone');
 
-
-
         if (!config('app.lock_passwords')) {
             $user->locale = $request->input('locale', 'en');
         }