Update file location and name for the Customizer Controls class.
Moved this class into the customizer folder and renamed the file.
Moved activation of TinyMCE customizations out of tinymce.php and into this file.
Remove initialization and move it into plugins.php
Removed inclusion of tinymce and moved it into plugins.php
Moved with tinymce.php from lib/tinymce to lib/plugins/tinymce