Upload media in the Select content dialog for TinyMCE 2.0.0
I also make the uploaded media selected automatically. You can find and download the nuget package by adding the nuget source: https://www.myget.org/F/episerver-util/api/v3/index.json.
Note: After installing, you may face with the run time error "module not found", please kindly refer to this post to fix it. Good luck!