User experience review queue/Upload Wizard drag & drop

UX issues

 * The upload button does not appear: screenshot, tested on Ubuntu 11.04 and Chromium and Firefox. Adding a single file seems to work fine. --Prolineserver (talk) 12:50, 2 June 2012 (UTC)
 * When dragging a second file, the "All uploads were successful!" and "Continue" button appear at the top-right corner inside the "Drop files to upload here" area which breaks the visual hierarchy. --Pginer (talk) 17:30, 6 June 2012 (UTC)

Known bugs

 * Sometimes doesn't trigger on drop but leaves drop zone active
 * Shows drag & drop invite even for browsers that don't support it