title: Assets Catalog unassigned category
body: <p>I am converting all my images for my iOS app from @3x resolution to @2x and @1x. I found that Xcode 6.3 sometimes? puts some of them to the Unassigned set.</p>
  
  <p>At the moment for example I have the @2x icon in the Universal set and the @1x in the Unassigned.</p>
  
  <p>Why wouldn't Xcode recognise and assign the icons to the Universal set? How can I fix that?  I know that I can manually 'fix' that by changing the .json but I obviously cannot do that for all my images.</p>
  
  <p>Thanks!</p>