Reverting not allowing spaces inside username
Merge pull request #2643 from infograf768/32883-master

Allow spaces
Revert "Merge pull request #2643 from infograf768/32883-master"

This reverts commit a01e4706117373f4e9c68e6e33f58e2cec3b9d26, reversing
changes made to 21161aa95829c8abb11646ebbb9e537a2bfdaf12.
$ Adding back Czech installation lang files
Preventing saving spaces at beginning and end of username for superuser
when installing Joomla
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
revert