Fix email validation acording to RFC 5322 Official Standard #4029
Summary
This MR changes the REGEX that validates the emails. RFC 5322 Standard (Source http://emailregex.com/)
Steps to test
- Open the register or create a new account option
- Enter an invalid email
- When the input loses focus it should show the error message
- Enter a valid email
- Error must go away
(Please check emails with dash and low dash)
Estimated Regression Scope
No regression expected
closes #4029 (closed)
Edited by Martin Santangelo