Allow Anonymous=false: Fix after sign up redirect path

[pglombardo]

Description

Reported by a user via email who was using PWP__ALLOW_ANONYMOUS=false:

"after creating an account it doesnt show the pop up which tells 
me to verify my e-mail. It rather shows the same pop up which 
can be confusing for the end user.

This PR changes the after sign up path when account confirmation is required (pretty much always).

Now after sign up when PWP__ALLOW_ANONYMOUS=false, you get this:

Related Issue

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

Checklist

• I've written tests (if applicable) for all new methods and classes that I created. (rake test)
• I've added documentation as necessary so users can easily use and understand this feature/fix.