Following recent similar actions done for entities.
Required at this stage to provider better & cleaner helpers
for common user and permission actions to built out permission testing.
The content of pages made non-viewable to a user via permissions, within a visible parent, could be seen via the plaintext export option. Before v0.30.6 this would have applied only to scenarios where all pages within the chapter were made non-visible. In v0.30.6 this would make all pages within the chapter visible.
As per #2414