Fixed #15290 -- Fixed a CSS styling issue with borders when the link item in a...

Fixed #15290 -- Fixed a CSS styling issue with borders when the link item in a changelist isn't the first item in the list_display. Thanks to Julien Phalip for the report and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15572 bcc190cf-cafb-0310-a4f2-bffc1f526a37