Add media workflow for custom headers
|Reported by:||koopersmith||Owned by:||koopersmith|
Choosing a custom header is a two step workflow. First, upload or select an image. Then, make sure the image is cropped to the theme's expectations. We'll need to integrate this into both custom-header.php and the customizer. The code in custom-header.php may need some untangling.
See #21390 for the master media ticket.