404 page should be optional for the page tree

[cb2004]

A lot of my clients know what they are doing and they know that a 404 page can be important to direct people to other pages of their website within the content. I think there should be a setting to enable the 404 page to be visible in the page tree for roles other than the superuser. Using the permissions scheme and allowing editing for say the template related to a 404 page has no effect.

[kongondo]

https://processwire.com/talk/topic/3843-how-to-define-the-404-page/