Add image's license to the lightbox header

Depends on…

* core
:* I77303d8e535fc1c42e14cfb853814e5c434a81ec
* CommonsMetadata
:* I5e6bc45f9751641e16426231dabcc8277b86fee0 (merged)
:* If3cf6a0ee444d1613d0caf14045b92fad6afa2ab (merged)

Change-Id: I60180f7ca3a16a04a0adee8af8482fa0940ac555
Merge "Add image's license to the lightbox header"