Improvements to the media uploader at responsive sizes:

* Change load order so larger breakpoint loads before smaller breakpoint.
* Use absolute positioning rather than floats, to fix some overflow issues.
* Remove the max-height media query so desktop browsers benefit from the responsive styles.
* Reset text inputs to 16px so iOS doesn't force zoom.
* Adjust the position of the close button so it doesn't overlap the Create Gallery link.

See #25977. Props joen.



git-svn-id: https://develop.svn.wordpress.org/trunk@26219 602fd350-edb4-49c9-b593-d223f7449a82