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Changes between Initial Version and Version 1 of Ticket #21483, comment 25

initial	v1
1	1	This seems to have been implemented [http://shibashake.com/wordpress-theme/how-to-add-the-media-manager-menu-to-the-theme-preview-interface/ here], although a bit differently. I do believe it is backwards-compatible, though.
	2
	3	EDIT*
	4	Found a better solution than what I posted above. [http://wpquestions.com/question/showChrono/id/9288/ Extend WP_Customize_Image_Control]
	5
	6	This implementation is NOT backwards compatible, at the moment. It does, however, do exactly what was originally proposed by @jjonesftw and what was implemented by @celloexpressions. Please forgive me if I'm beating a dead horse here - just trying to explore all options. The solution I have suggested does provide the best UI I've seen to date, when it comes to uploading images in the Customizer.