[fix] JFactory::getUser() should always return a user object. Fixes #811
[Code Style] Fix newfeeds modal form field. Closes #4597
[Code Style] Code style for com_content backend. Closes #4559
[Codestyle] Removing some blanks
#4894 / should be escaped as it is a delimiter
[fix] Mail helper is not synced with email validation
correction
Correcting unit tests
correcting comment
Merge pull request #4899 from infograf768/mailhelper

[fix] Mail helper is not synced with email validation