Don't show references to Pages when not available

Does this MR meet the acceptance criteria?

• [-] Changelog entry added, if necessary
• [-] Documentation created/updated
• [-] API support added
• Tests added for this feature/bug
• Review
  • [-] Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • [-] Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together

What are the relevant issue numbers?

In the commit description, and MR widget

@zj Looks good to me as long as we just don't support pages for subgroup projects.

@grzesiek Please review? Thanks!

assigned to @grzesiek

approved this merge request

restored source branch zj-disable-pages-in-subgroups

marked the checklist item Has been reviewed by Frontend as completed

@zj I left just a few notes.

assigned to @zj

resolved all discussions

assigned to @grzesiek

assigned to @zj

resolved all discussions

resolved all discussions

@grzesiek You were right, thanks for reexplaining!

resolved all discussions

added 1 commit

• 04cd47dd - Don't show references to Pages when not available

Compare with previous version

mentioned in merge request !13917

assigned to @grzesiek

Thanks @zj! Looks good to me!

approved this merge request

merged

mentioned in commit d5d24976