title: Objective-C / Cocoa: How do I revert a window (and all controls on it) to Interface Builder defaults?
body: <p>I got a Window with several controls and labels loaded from xib. 
  At runtime some label titles are set and some buttons are disabled.
  I want to revert everything to the state where the program started.</p>
  
  <p>I can do this like:</p>
  
  <pre><code>[button setTitle:@"Start"];
  [button setEnabled:@"YES"];
  myLabel.stringValue = str;
  </code></pre>
  
  <p>etc.</p>
  
  <p>I rather revert the whole Window to the xib values.
  How can this be done?</p>