Changing logging preferences cleans up the log.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5593 2fea6a4d-a838-0410-917b-93a53c48e9d2
Disabling logging hides the Visitor Logs panel.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5594 2fea6a4d-a838-0410-917b-93a53c48e9d2
To the correct navigation menu.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5595 2fea6a4d-a838-0410-917b-93a53c48e9d2