Fixed settings redirect issue and custom head display

- Fixed issue where redirect for `/settings` view would not be ran
  through base url generator so would not create a correct path in some
  cases. Now routed through controller with normal redirect.
- Fixed custom head content being active on settings pages due to route
  name changes, for when viewing settings, in last release.

Fixes #3356 and #3355

app/Http/Controllers/SettingController.php

@@ -19,9 +19,17 @@ class SettingController extends Controller
     }
 
     /**
-     * Display a listing of the settings.
+     * Handle requests to the settings index path
      */
-    public function index(string $category)
+    public function index()
+    {
+        return redirect('/settings/features');
+    }
+
+    /**
+     * Display the settings for the given category.
+     */
+    public function category(string $category)
     {
         $this->ensureCategoryExists($category);
         $this->checkPermission('settings-manage');