title: File manager for TinyMCE 5.0.6
body: <p>I have installed TinyMCE (TinyMCE Dev Package 5.0.6) in my personal project. Everything is installed and
  configured correctly, but there is no File Manager available in this package. To resolve this flaw I have tried to install 
  ResponsiveFileManager (RFM), but it just doesn't work. There is an error in a console when I click an icon of the RFM:</p>
  
  <pre><code>plugin.js:84 Uncaught TypeError: editor.windowManager.openUrl is not a function
      at Object.openmanager [as onAction] (plugin.js:84)
      at theme.js:21482
      at theme.js:9575
      at theme.js:21480
      at theme.js:2457
      at each (theme.js:267)
      at run (theme.js:2456)
      at theme.js:2969
      at theme.js:56
      at theme.js:10825
  </code></pre>
  
  <p>I guess that RFM is not properly prepared for this version of TinyMCE.</p>
  
  <p>So I want to ask if there are any available file manager plugins for TinyMCE.
  I need a file manager which is capable of:
  - preview of uploaded photos,
  - create new catalogs,
  - upload files to server's catalogs (with Drag and Drop functionality as well).</p>