Private Spaces selected to Receive 'New Content' Notifications in the administration settings shouldn't appear in the notification settings of users who are not members of the space

[marc-farre]

What steps will reproduce the problem?

Select a private Space in the notifications' administration settings:

Open the notification settings of a user who is not members of the "Private" space

What is the expected result?

What do you get instead?

Additional info

Q	A
HumHub version	1.16-beta.1

[yurabakhtin]

@luke- Fixed in PR #6935.