#1490 adds ajax_handler_auto_show to debugbar.php (#1493)

* #1490 adds ajax_handler_auto_show and some documentation

* Update debugbar.php

* Update debugbar.php

* better description of ajax_handler_auto_show

config/debugbar.php

@@ -116,10 +116,14 @@
      |
      | Note for your request to be identified as ajax requests they must either send the header
      | X-Requested-With with the value XMLHttpRequest (most JS libraries send this), or have application/json as a Accept header.
+     | 
+     | By default `ajax_handler_auto_show` is set to true allowing ajax requests to be shown automatically in the Debugbar.
+     | Changing `ajax_handler_auto_show` to false will prevent the Debugbar from reloading.
      */
 
     'capture_ajax' => true,
     'add_ajax_timing' => false,
+    'ajax_handler_auto_show' => true,
 
     /*
      |--------------------------------------------------------------------------