Begin of the deletion These are just notes to facilitate the implementation. The authoritative specification is in <mention class="mention" data-id="49688" data-type="work_package" data-text="#49688">#49688</mention>

(Note: `Project Attributes` is a new name for the existing concept of `Project Custom Fields`)

End of the deletion ### Acceptance criteria

* Project custom fields are now edited within their own admin settings page
* In order to avoid confusion, the tab `project` Begin of the insertionisEnd of the insertion Begin of the deletion should beEnd of the deletion removed from the custom fields admin settings pages