If an admin or moderator edits a visitor's post, the restrictions should be based

on the *editors* access rights, not the original poster.

spec/fabricators/user_fabricator.rb

@@ -49,3 +49,9 @@ Fabricator(:another_admin, from: :user) do
   admin true
 end
 
+Fabricator(:visitor, from: :user) do
+  name 'Newbie Newperson'
+  username 'newbie'
+  email 'newbie@new.com'
+  trust_level TrustLevel.levels[:visitor]
+end