ckeditor编辑器和elfinder文件管理器

取消回收站功能：https://github.com/Studio-42/elFinder/issues/2067

https://github.com/Studio-42/elFinder/wiki/Integration-with-CKEditor
 
https://ckeditor.com/docs/ckfinder/demo/ckfinder3/samples/ckeditor.html
 
https://github.com/Studio-42/elFinder/wiki/Connector-configuration-options-2.1