Oops, stop requiring a new password whenever AuthUser is changed

Ah right, I went and checked the Devise source code, and the default
implementation for `password_required?` is a bit trickier than I
expected:

```ruby
def password_required?
  !persisted? || !password.nil? || !password_confirmation.nil?
end
```

Looks like `super` does a good enough job here, though! (I'm actually
kinda surprised, I wasn't sure how Ruby's `super` rules worked, and
this isn't a subclass thing—or maybe it is, maybe the `devise` method
adds a mixin? Idk! But it does what I expect, so, great!)

So now, we require the password if 1) Devise doesn't see a UI reason
not to, *and* 2) the user isn't using OmniAuth (i.e. NeoPass).

This had caused a bug where it was impossible to use the Settings page
*without* changing your password! (The form says it's okay to leave it
blank, which stopped being true! But now it's fixed!)

app/models/auth_user.rb

@@ -37,7 +37,7 @@ class AuthUser < AuthRecord
   end
 
   def password_required?
-    !uses_omniauth?
+    super && !uses_omniauth?
   end
 
   def self.from_omniauth(auth)

config/environments/production.rb

@@ -136,7 +136,8 @@ Rails.application.configure do
   config.public_data_root = Rails.root / "public" / "public-data"
 
   # To see NeoPass features, add ?neopass=<SECRET> to relevant pages.
-  config.neopass_access_secret = Rails.credentials.neopass.access_secret
+  config.neopass_access_secret =
+    Rails.application.credentials.neopass.access_secret
 
   # Use the live NeoPass production server.
   config.neopass_origin = "https://oidc.neopets.com"