Tinymce 5 support
Fix readme for section tinyMCE 5. (#265) * replaces the file_browser_callback with file_picker_callback in readme Signed-off-by: alicompu <[email protected]> * Revert "replaces the file_browser_callback with file_picker_callback in readme" This reverts commit bab460df07d4bd108069d136153636c22515c2fd. * replaces the file_browser_callback with file_picker_callback in readme Signed-off-by: alicompu <[email protected]>