Summary of Changes

When a user registers on the frontend there are several validations before it's saved. After saving several emails are sent by the system. Now if the email sending fails for some reason the user is redirected back to the registration form and an error message is shown, although the user is registered. That means, if the user tries it again, it gets the message, that the username/email is already used. This makes not really sense, especially the user can't do anything with the error messages. So this PR does not redirect the user back to the registration form after the user is created. It also removed the "admin error messages" which should still be logged but not shown to the end user.

Testing Instructions

• Apply patch
• Disable the email function in the configuration (Send Emails)
• Register a new user

Actual result BEFORE applying this Pull Request

User is redirected back to form and get some errors which are not helpful:

Expected result AFTER applying this Pull Request

Registration was successful but warning shown: