multisite: editor permissions do not check if the ancestor elements are editable or not

[MyPyDavid]

Description / Beschreibung

Editor can add elements to elements that should be editable only be other editors

Expected behaviour / Erwartetes Verhalten

The descendant elements should also not be editable by the editor

Steps to reproduce / Schritte zum Reproduzieren

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Context / Kontext

Please state your operating system, the RDMO version, and (if applicable) the browser the error occurred in.

References / Verweise