And OOjs UI finally found its way into UploadWizard. Unfortunately pressing the "Get from Flickr" button with the input field (Flickr URL) filled with URL https://www.flickr.com/photos/rillke/ or https://www.flickr.com/photos/rillke/sets/72157646495502983 just does nothing. Not even a request to Flickr (network tab).
This issue appears on the live site. I have the necessary privileges for Flickr Upload (upload_by_url) and there is nothing odd in the JavaScript console.
Fortunately there is http://tools.wmflabs.org/flickr2commons/