title: Editing storyboard in Xcode 5 is very slow
body: <p>I have Xcode 5 and storyboard editing is very slow. Each time I start Xcode I get the message: </p>
  
  <p>"The document "MainStoryboard.storyboard" had 26 internal inconsistencies that were found and repaired."</p>
  
  <p>and </p>
  
  <p>"Multiple resources have the same name: yellowbutton.png, etc.
  The preceding issues may have occurred due to an SCM operation such as merging."</p>
  
  <p>Standard solutions as deleting the workspace file did not help. How can I solve this?</p>
  
  <p>Thanks!</p>