Fixed admin caching issues

classes/plugin/AdminBaseController.php

@@ -2,6 +2,7 @@
 
 namespace Grav\Plugin\Admin;
 
+use Grav\Common\Cache;
 use Grav\Common\Config\Config;
 use Grav\Common\Data\Data;
 use Grav\Common\Filesystem\Folder;
@@ -1018,6 +1019,8 @@ class AdminBaseController
             }
         }
 
+        Cache::clearCache('invalidate');
+
         $this->admin->json_response = [
             'status'  => 'success',
             'message' => $this->admin::translate('PLUGIN_ADMIN.REMOVE_SUCCESSFUL')