* Add dimensions to the "sizes" dropdown.
* Ensure a `full` size is generated in `wp_prepare_attachment_for_js()`.
* Print the dimensions for the full size in the attachment summary (instead of those for the current size).
* When generating the attachment view's template, map `imageSize()` to the `size` property instead of overriding the default data.
see #21390.
git-svn-id: https://develop.svn.wordpress.org/trunk@22580 602fd350-edb4-49c9-b593-d223f7449a82