Fix logic inversion in [28124] to ensure widgets stay with themes during a theme switch.

Merges [28161] to the 3.9 branch.

props gcorne.
fixes #27897.


git-svn-id: https://develop.svn.wordpress.org/branches/3.9@28162 602fd350-edb4-49c9-b593-d223f7449a82
Theme Installer: Proper redirection and action links post-install in multisite.

Merges [28163] to the 3.9 branch.

fixes #27869.


git-svn-id: https://develop.svn.wordpress.org/branches/3.9@28164 602fd350-edb4-49c9-b593-d223f7449a82