* move sideMenuItem group, icon_bas64, icon_base64_minimized to attributes property & support them october >1.0.467

* EventEmmiter with AssetMaker for correctly add assets from Plugin

Plugin.php

@@ -7,6 +7,7 @@ use Cms\Classes\Controller as CmsController;
 use Cms\Classes\Page as CmsPage;
 use System\Classes\PluginBase;
 use System\Traits\AssetMaker;
+use System\Traits\EventEmitter;
 
 /**
  * Menu Plugin Information File
@@ -16,6 +17,7 @@ class Plugin extends PluginBase
     const ICON = 'icon-sliders';
 
     use AssetMaker;
+    use EventEmitter;
 
     /**
      * @var CmsController