[1.2.X] Fixed #14193: prepopulated_fields javascript now concatenates in...

[1.2.X] Fixed #14193: prepopulated_fields javascript now concatenates in correct order. Thanks to bmihelac for the patch.

Backport of [14122] from trunk

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14123 bcc190cf-cafb-0310-a4f2-bffc1f526a37