Customizer: Allow to skip cropping header images if image width is smaller than or equal to theme width.

Merges [28219] to the 3.9 branch.

fixes #27936.


git-svn-id: https://develop.svn.wordpress.org/branches/3.9@28225 602fd350-edb4-49c9-b593-d223f7449a82
TinyMCE: Restore old wordpress_adv_hidden editor parameter to enable force-showing the kitchen sink.

Merges [28181] to the 3.9 branch.

props azaozz.
fixes #27963.


git-svn-id: https://develop.svn.wordpress.org/branches/3.9@28226 602fd350-edb4-49c9-b593-d223f7449a82