Code page appears in the Navigation

[ane-gabriela]

Steps to reproduce:

1. Access the wiki as Admin / simple user / guest
2. Click on Meetings from Navigation
3. Observe the child pages

Expected results: No code pages appear in the Navigation panel.

Actual results: The code / migrations page for all users.

Environment: Windows 10, XWiki 8.4.5 Standard and Edge 18, Meeting Application (Pro) 1.9.2