title: Multi language localization storyboard support issue
body: <p>I have an issue with my project storyboard. I have added two localizations more to storyboard, so now I have three storyboards: spanish, english and basque. All of them depending from the main one:</p>
  
  <p><img src="https://i.stack.imgur.com/L9Inr.png" alt="enter image description here"></p>
  
  <p>Now I have the issue that I have to update all changes manually to all to storyboards, because  if I do changes to MainStoryboard, the others are not updated with this changes.</p>
  
  <p>How can I modify all storyboards at the same time?</p>
  
  <p>Thanks </p>