Fix the conditional enqueueing/printing of colors stylesheets, without breaking dependencies.

fixes #18380.
see #20729 which should properly fix this.

Built from https://develop.svn.wordpress.org/trunk@27111


git-svn-id: http://core.svn.wordpress.org/trunk@26978 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Network install: When showing the path to wp-config.php make sure our slashes are normalized.

props VarunAgw.
fixes #27025.

Built from https://develop.svn.wordpress.org/trunk@27112


git-svn-id: http://core.svn.wordpress.org/trunk@26979 1a063a9b-81f0-0310-95a4-ce76da25c4cd