Set Available and Inactive Widget areas to not collapse, since they don't look like collapsing elements. Fixes #26327, props MikeHansenMe.



git-svn-id: https://develop.svn.wordpress.org/trunk@26593 602fd350-edb4-49c9-b593-d223f7449a82
Rename the new custom-background arguments passed to add_theme_support().

 * background-position becomes default-position-x
 * background-attachment becomes default-attachment
 * background-repeat becomes default-repeat

These are in line with existing default-image and default-color arguments, and also makes the position argument unambiguous and forwards compatible.

fixes #20816.


git-svn-id: https://develop.svn.wordpress.org/trunk@26594 602fd350-edb4-49c9-b593-d223f7449a82