Steps to reproduce the issue

• BE > go to /administrator/index.php?option=com_config&view=component&component=com_users
• I don't want FE registration: Set "Allow User Registration" to NO. i think that's the default setting after installation(?).
• But I want that new users created in BE are assigned automatically to user group "Author".
• Setting "New User Registration Group" is not visible.
• It's not obvious that I first have to set "Allow User Registration" to YES, then have to change "New User Registration Group" to "Author", then have to change "Allow User Registration" to NO.
• Afterwards "New User Registration Group" is invisible even if it's relevant in BE, too.

Expected result

"New User Registration Group" should be always visible.

System information (as much as possible)

Joomla 3.7 staging of yesterday.