Avoid Deletion of last user

[modxbot]

pedley created Redmine issue ID 4069

ok I know I was stupid, But I was working with a front end script that created extended users, all worked fine, until it came to needing to clear out the users after testing that particular part. I deleted them using the manager system, but got a little overenthusiastic and selected all users and forgot to uncheck the main admin user.

Hit delete and ummmmm deleted all access to the manager. Thankfully I knew enough to rebuild the user using phpmyadmin, but I can see a time a user does exactly the same and can't rebuild.

So some sort of check to see if the delete removes the last member of admin or at the very least the last member and asks are you sure.

[splittingred]

splittingred submitted:

Awaiting integration: #90